... ,chrome,stainless steel,iron,ect.2.Sealing from:2RS ZZ ,Z ,RS,OPEN (metal or nylon) 3.OEM offered for ... finish workshop About us1. Professional supplier: over 9 years in precision bearings, rollers, pulleys2. Popular in the world: good quality, ... parts . Our products with advanced equipment,mature techniques and with high precision, low noise, long-life and excellent reliability. Our annual output ...