1,Long working life 2,Anti-rust and waterproof 3,Low price and good quality 4,The materials are bearing steel Specifications1) Bearing type: 6000 series,6200 series,6300 series,6400 series2) Bore diameter range: 4mm to 100mm 3) Shield/closure: Z ZZ RS 2RS OPENBearing Features: 1). High quality control 2). High swiveling accuracy 3). Suitable for high speed 4). Low friction, long service life 5). ...