Roller NO: PU620040-20 Material: Polyurethane Shape: Flat Inner Diameter: 10mm Outer Diameter: 40mm Width: 20mm Bearing NO: 6200RS Bearing Size: 10x30x9mm Bearing Material: Bearing Steel Lubrication: Grease Feature: Low nosie, Run smooth, High Service life, High load Application: Furniture, Cabinet, Doors & Windows, Appliances, 8x40x30 mm Polyurethane Pinch Roller For Sliding Doors PUT69840-30 30 mm Diameter PU Coated Wear-Resistant Driven Pulley