Three layers of hardening, B1 (270*180*70)
Three layers of hardening, B2(270*210*60)
Three layers of hardening, B4 (300*200*50)
Three layers of hardening, B5 (300*200*80)
Three layers of hardening, B6 (300*250*80)
Three layers of hardening, B9 (340*260*60)
Three layers of hardening, B10 (360*260*60)
Three layers of hardening, B11 (360*260*40)
Three layers of hardening, B13 (400*300*40)
Three layers of hardening, B15 (450*350*100)
Three layers of hardening, E1(150*100*40)
Three layers of hardening, E2 (150*100*50)
Three layers of hardening, E3 (150*150*50)
Three layers of hardening, E4 (180*110*50)
Three layers of hardening, E6 (200*110*40)
Three layers of hardening, E7 (200*140*40)
Three layers of hardening, E8 (230*90*60)
Three layers of hardening, E9 (230*130*70)
Three layers of hardening, E10 (230*160*50)
Three layers of hardening, E11(270*165*50)
Three layers of hardening, E12(240*210*40)
Three layers of hardening, E19(220*150*40)
Three layers of hardening, E21(260*150*40)
Three layers of hardening, E22(240*125*50)
Three layers of hardening, B17(360*300*60)
Three layers of hardening, B18(450*350*80)
Three-layer extra hard, B1 (270*180*70)
Three-layer extra hard, B2(270*210*60)
Three-layer extra hard, B4 (300*200*50)
Three-layer extra hard, B5 (300*200*80)
Three-layer extra hard, B6 (300*250*80)
Three-layer extra hard, B9 (340*260*60)
Three-layer extra hard, B10 (360*260*60)
Three-layer extra hard, B11 (360*260*40)
Three-layer extra hard, B13 (400*300*40)
Three-layer extra hard, B15 (450*350*100)
Three-layer extra hard, E1(150*100*40)
Three-layer extra hard, E2 (150*100*50)
Three-layer extra hard, E3 (150*150*50)
Three-layer extra hard, E4 (180*110*50)
Three-layer extra hard, E6 (200*110*40)
Three-layer extra hard, E7 (200*140*40)
Three-layer extra hard, E8 (230*90*60)
Three-layer extra hard, E9 (230*130*70)
Three-layer extra hard, E10 (230*160*50)
Three-layer extra hard, E11(270*165*50)
Three-layer extra hard, E12(240*210*40)
Three-layer extra hard, E19(220*150*40)
Three-layer extra hard, E21(260*150*40)
Three-layer extra hard, E22(240*125*50)
Three-layer extra hard, B17(360*300*60)
Three-layer extra hard, B18(450*350*80)