Specifications and models 【e1】15*10*4cm; three-layer mid-range hardening [jiangsu, zhejiang, shanghai and anhui] 【e1】15*10*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e1】15*10*4cm; three-layer mid-range hardening [other provinces] 【e1】15*10*4cm; three-layer high-grade extra hard [other provinces] [e3] 15*15*5cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e3】15*15*5cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e3】15*15*5cm; three-layer mid-range hardening [other provinces] 【e3】15*15*5cm; three layers of high-grade extra hard [other provinces] [e4] 18*11*5cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e4】18*11*5cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e4】18*11*5cm; three-layer mid-range hardened [other provinces] 【e4】18*11*5cm; three layers of high-grade extra hard [other provinces] 【e5】20*13*3cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] [e5] 20*13*3cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e5】20*13*3cm; three-layer mid-range hardening [other provinces] 【e5】20*13*3cm; three layers of high-grade extra hard [other provinces] [e6] 20*11*4cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e6】20*11*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e6】20*11*4cm; three-layer mid-range hardening [other provinces] 【e6】20*11*4cm; three layers of high-grade extra hard [other provinces] 【e7】20*14*4cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e7】20*14*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e7】20*14*4cm; three-layer mid-range hardened [other provinces] 【e7】20*14*4cm; three layers of high-grade extra hard [other provinces] 【e8】23*9*6cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e8】23*9*6cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e8】23*9*6cm; three-layer mid-range hardened [other provinces] 【e8】23*9*6cm; three-layer high-grade extra hard [other provinces] 【e9】23*13*7cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e9】23*13*7cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e9】23*13*7cm; three-layer mid-range hardened [other provinces] 【e9】23*13*7cm; three layers of high-grade extra hard [other provinces] 【e10】23*16*5cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e10】23*16*5cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e10】23*16*5cm; three-layer mid-range hardened [other provinces] 【e10】23*16*5cm; three layers of high-grade extra hard [other provinces] 【e11】27*16.5*5cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e11】27*16.5*5cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e11】27*16.5*5cm; three-layer mid-range hardening [other provinces] 【e11】27*16.5*5cm; three layers of high-grade extra hard [other provinces] 【e19】22*15*4cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e19】22*15*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e19】22*15*4cm; three-layer mid-range hardened [other provinces] 【e19】22*15*4cm; three layers of high-grade extra hard [other provinces] 【e21】26*15*4cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e21】26*15*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e21】26*15*4cm; three-layer mid-range hardened [other provinces] 【e21】26*15*4cm; three layers of high-grade extra hard [other provinces] 【e22】24*12.5*5cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【e22】24*12.5*5cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【e22】24*12.5*5cm; three-layer mid-range hardened [other provinces] 【e22】24*12.5*5cm; three layers of high-grade extra hard [other provinces] 【b1】27*18*7cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b1】27*18*7cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b1】27*18*7cm; three-layer mid-range hardened [other provinces] 【b1】27*18*7cm; three-layer high-grade extra hard [other provinces] [b2] 27*21*6cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b2】27*21*6cm; three-layer high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] [b2] 27*21*6cm; three-layer mid-range hardening [other provinces] 【b2】27*21*6cm; three-layer high-grade extra hard [other provinces] 【b4】30*20*5cm; three-layer mid-range hardening [jiangsu, zhejiang, shanghai and anhui] 【b4】30*20*5cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b4】30*20*5cm; three-layer mid-range hardening [other provinces] 【b4】30*20*5cm; three-layer high-grade extra hard [other provinces] 【b5】30*20*8cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b5】30*20*8cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b5】30*20*8cm; three-layer mid-range hardening [other provinces] 【b5】30*20*8cm; three-layer high-grade extra hard [other provinces] 【b6】30*25*8cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b6】30*25*8cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b6】30*25*8cm; three-layer mid-range hardened [other provinces] 【b6】30*25*8cm; three layers of high-grade extra hard [other provinces] 【b10】36*26*6cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b10】36*26*6cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b10】36*26*6cm; three-layer mid-range hardened [other provinces] 【b10】36*26*6cm; three layers of high-grade extra hard [other provinces] 【b11】36*26*4cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b11】36*26*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b11】36*26*4cm; three-layer mid-range hardening [other provinces] 【b11】36*26*4cm; three layers of high-grade extra hard [other provinces] 【b15】45*35*10cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b15】45*35*10cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b15】45*35*10cm; three-layer mid-range hardened [other provinces] 【b15】45*35*10cm; three layers of high-grade extra hard [other provinces] 【b17】36*30*6cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b17】36*30*6cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b17】36*30*6cm; three-layer mid-range hardened [other provinces] 【b17】36*30*6cm; three-layer high-grade extra hard [other provinces] 【b18】45*35*8cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b18】45*35*8cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b18】45*35*8cm; three-layer mid-range hardened [other provinces] 【b18】45*35*8cm; three layers of high-grade extra hard [other provinces] 【b21】33*24*4cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b21】33*24*4cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b21】33*24*4cm; three-layer mid-range hardened [other provinces] 【b21】33*24*4cm; three layers of high-grade extra hard [other provinces] 【b24】40*30*8cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b24】40*30*8cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b24】40*30*8cm; three-layer mid-range hardened [other provinces] 【b24】40*30*8cm; three layers of high-grade extra hard [other provinces] 【b30】50*40*12cm; three-layer mid-range hardened [jiangsu, zhejiang, shanghai and anhui] 【b30】50*40*12cm; three layers of high-grade extra hard [jiangsu, zhejiang, shanghai and anhui] 【b30】50*40*12cm; three-layer mid-range hardened [other provinces] 【b30】50*40*12cm; three layers of high-grade extra hard [other provinces]