Specifications and models
10*6*4CM; Three layers of special hard,10*8*4CM; Three layers of special hard,10*10*4CM; Three layers of special hard,10*10*5CM; Three layers of special hard,11*10*6CM; Three layers of special hard,12*9*4CM; Three layers of special hard,12*11*3.5CM; Three layers of special hard,13*8*2.5CM; Three layers of special hard,13*8*4CM; Three layers of special hard,13*12*5CM; Three layers of special hard,14*9*3CM; Three layers of special hard,15*10*2.5cm; three layers of extra hard,15*10*4CM; Three layers of special hard,15*10*6CM; Three layers of special hard,(T1)15*15*5CM; Three-layer special hard,16*15*4CM; Three layers of special hard,16*15*5CM; Three layers of special hard,16*16*6CM; Three layers of special hard,18*10*3CM; Three layers of special hard,18*10*4CM; Three layers of special hard,18*11*6CM; Three layers of special hard,20*10*1.6CM; Three layers of special hard,20*10*4CM; Three layers of special hard,20*11*3CM; Three layers of special hard,20*11*4CM; Three layers of special hard,20*11*4.8CM; Three layers of special hard,(New T2)20*13*3.5CM; Three layers of extra hard,20*13*6CM; Three layers of special hard,(T2)20*14*4CM; Three layers of special hard,20*15*5CM; Three layers of special hard,20*16*2CM; Three layers of special hard,20*17*5CM; Three layers of special hard,20*17*7CM; Three layers of special hard,20*20*4CM; Three layers of special hard,20*20*5CM; Three layers of special hard,21*15*4CM; Three layers of special hard,21*17*5CM; Three layers of special hard,22*14*4CM; Three layers of special hard,22*15*6CM; Three layers of special hard,22*16*7CM; Three layers of special hard,22*20*7CM; Three layers of special hard,23*13*7CM; Three layers of special hard,23*14*4CM; Three layers of special hard,23*16*5CM; Three layers of special hard,24*12*4CM; Three layers of special hard,25*15*4CM; Three layers of special hard,25*17*5CM; Three layers of special hard,25*18*2CM; Three layers of special hard,25*20*5CM; Three layers of special hard,(T4)25*20*7CM; Three layers of special hard,25*20*9CM; Three layers of special hard,25*25*5CM; Three layers of special hard