Railway: anodized aluminium alloy body with two chrome-plated steel shafts Carriage : Anodized aluminium alloy plate 4 pieces double row balls bearings(rollers) 2 pieces concentric bolts and 2 pieces eccentric bolts 2 pieces plastic lubrication cover with oil soaked felt wipers Feature 1.High speed, low friction and low noise 2.Clearance/preload is adjustable 3.Sealed and lubricated Saibo standard industry package
