Detailed Product Description Used in granite automatic grinding lineTechnical formGrainNo.36#334146#334260#334380#3344120#3345180#3346240#3347320#3348500#3349 Why adopt nylon 612?Nylon 612 can retain rigidity and tenacity in humidity circumvents .With adding water ,the other kind of nylon will be softening and loss rigidity .Nylon 6/66/610 comes from biology and petroleum polymer without ...