... : 2RS ZZ ,Z ,RS,OPENHigh quality bearing, 1.high precision, 2.low noise, 3.long-life 4.excellent reliability.5 ... mainly product miniature deep groove ball bearings for carbon steel, bearing steel , stainless steel,nonstandard bearing and injection molding ... roller and dysmorphism parts . Our products with advanced equipment,mature techniques and with high precision, low ...