LR5001NPP Track Roller 2 Rows Bearing Sealed 12x30x12 Track BearingsLR5001NPP Double Row ball bearing One Bearing LR5001NPP Track Roller Double Row Bearing, bearing is a Sealed Item: LR5001NPP Bearing Type: Track Roller Double Row Bearing Size: 12mm x 30mm x 12mm Inner Diameter: 12mm Outer Diameter: 30mm Width : 12mm Quantity: One bearing Load rating Cw: 4,950N Load rating Cow: 3,100 N Speed: 8,500 RPM Dimensions d D B C Rs 12mm 30mm 12mm 12mm 0. 3mm