Specification model 15*10*4cm[W1]; Level 1, three-layer, special offer B+ 15*10*4cm[W1]; Level 2, three-layer standard A+ 15*10*4cm[W1];4-level three-layer super hard N+ 15*10*6cm[W2]; Level 2, three-layer standard A+ 15*15*5cm[W6]; Level 1, three-layer, special offer B+ 15*15*5cm[W6]; Level 2, three-layer standard A+ 15*15*5cm[W6];3-level triple-layer extra-hard K+ 18*11*5cm[T7]; Level 1, three-layer, special offer B+ 18*11*5cm[T7]; Level 2, three-layer standard A+ 18.8*11*2.9cm[W5]; Level 1 three-layer special offer B+ 18.8*11*2.9cm[W5]; Level 2, three-layer standard A+ 19*10*3cm[B2]; Level 1 three-layer special offer B+ 19*10*3cm[B2]; Level 2, three-layer standard A+ 19*10*3cm[B2];4-level three-layer super hard N+ 20*11*4cm[D1]; Level 2, three-layer standard A+ 20*11*4cm[D1];3-level triple-layer extra-hard K+ 20*11*4cm[D1];4-level three-layer super hard N+ 20*13*3cm[W3]; Level 1, three-layer, special price B+ 20*13*3cm[W3]; Level 2, three-layer standard A+ 20*13*3cm[W3];3-level triple-layer extra hard K+ 20*13*3cm[W3];4-level three-layer super-hard N+ 20*14*4cm[W4]; Level 1 three-layer special offer B+ 20*14*4cm[W4]; Level 2, three-layer standard A+ 20*14*4cm[W4];3-level triple-layer extra-hard K+ 21.5*14.5*4cm[K1]; Level 1, three-layer, special offer B+ 21.5*14.5*4cm[K1]; Level 2, three-layer standard A+ 21.5*14.5*4cm[K1];4-level three-layer super hard N+ 22*14*4cm[D6]; Level 2, three-layer, standard A+ 22*15*4cm[D7]; Level 2, three-layer standard A+ 22*15*4cm[D7];3-level triple-layer extra hard K+ 23*16*5cm[K8]; Level 1, three-layer, special price B+ 23*16*5cm[K8]; Level 2, three-layer standard A+ 23.8*12*4cm[K38]; Level 2, three-layer standard A+ 25*20*7cm[K4]; Level 2, three-layer standard A+ 25*20*7cm[K4];3-level triple-layer extra-hard K+ 25*25*5cm[K9]; Level 2, three-layer standard A+ 26*15*4cm[K5]; Level 2, three-layer standard A+ 27*16.5*5cm[K3]; Level 2, three-layer standard A+ 27*16.5*5cm[K3];3-level triple-layer extra hard K+ 28*17*4cm[K2]; Level 1, three-layer, special price B+ 28*17*4cm[K2]; Level 2, three-layer standard A+ 30*20*5cm[C1]; Level 2, three-layer standard A+ 30*20*5cm[C1];3-level triple-layer extra-hard K+ 30*20*8cm[C2]; Level 2, three-layer standard A+ 30*20*8cm[C2];3-level triple-layer extra-hard K+ 30*21*7cm[C3]; Level 2, three-layer standard A+ 30*21.4*5cm[S3]; Level 2, three-layer standard A+ 30*21.4*5cm[S3];3-level triple-layer extra hard K+ 30*21.5*3.5cm[C5]; Level 2, three-layer standard A+ 30*22*5cm[C8]; Level 2, three-layer standard A+ 32*26*4cm[S2];3-level triple-layer extra-hard K+ 32*26*5cm[S5]; Level 2, three-layer standard A+ 32*26*5cm[S5];3-level triple-layer extra hard K+ 33*23*7cm[C14]; Level 2, three-layer standard A+ 33*23*7cm[C14];3-level triple-layer extra-hard K+ 33*24*4cm[S4]; Level 2, three-layer standard A+ 33*24*4cm[S4];3-level triple-layer extra hard K+ 36*26*6cm[S7];4-level three-layer super hard N+ 37*29*6cm[S8]; Level 2, three-layer standard A+ 37*29*6cm[S8];3-level triple-layer extra hard K+ 37.8*29*8cm[S10]; Level 2, three-layer standard A+ 37.8*29*8cm[S10];3-level triple-layer extra-hard K+ 39.8*30*5.9cm[F1]; Level 2, three-layer standard A+ 39.8*30*5.9cm[F1];3-level triple-layer extra hard K+ 40*30*4cm[V3];3-level triple-layer extra hard K+ 40*30*6cm[V4];3-level triple-layer extra-hard K+ 40*30*8cm[V5];3-level triple-layer extra hard K+ 40*30*10cm[V1];3-level triple-layer extra-hard K+ 40*30*12cm[F7];3-level triple-layer extra hard K+ 40*30*12cm[F7];4-level three-layer super hard N+ 41.5*30*3.9cm[F2]; Level 2, three-layer standard A+ 41.5*30*3.9cm[F2];3-level triple-layer extra hard K+ 42*30*5.9cm[F9];3-level triple-layer extra hard K+ 42*32*7cm[V8];3-level triple-layer extra-hard K+ 42.5*32*8cm[F4];3-level triple-layer extra hard K+ 43*34*9cm[F3];3-level triple-layer extra hard K+ 45*35*8cm[H3];3-level triple-layer extra hard K+ 50*40*6cm[F13];3-level triple-layer extra hard K+ 50*40*10cm[X1];3-level triple-layer extra hard K+ 15*10*4cm [double-sided white]; Level 3, three-layer extra hard K+ 18*11*5cm [double-sided white]; Level 3, three-layer extra hard K+ 19*10*3cm [double-sided white]; Level 3, three-layer extra-hard K+ 20*13*3cm [double-sided white]; Level 3, three-layer extra hard K+ 20*14*4cm [double-sided white]; Level 3, three-layer extra-hard K+ 23*16*5cm [double-sided white]; Level 3, three-layer extra hard K+ 50*40*6cm [double-sided white]; Level 3, three-layer extra hard K+