The coupling has many types and sizes, and it is made of good quality steel alloy 40cr.It has three functions : wearproof, corrosion-resisting andreducing the friction.

• 该产品有各种尺寸和型号，其基本材料为优质合计钢40cr,具有耐磨损、耐磨蚀、减磨阻三大功能。