... products are hard-wearing capability, finish and good position. GUIDE PIN: material SUJ2, hardness above HRC58, grind after heat treatment ... finish and position pretty good. Work precisely and hard-wearing.GUIDE BUSHINGS: material SUJ2, hardness above HRC58, after grinding, its ... capability, we also can provide with MOS2 and oilless GUIDE BUSHING of mosaic structure copper alloy. These series products ...