We offer discount for large quantity. Welcome to us!2pcs 50X70Mm PP Flat Stainless Steel Roller Bearing Wheel Guide 6201 M12 Screw for Electric Sliding Gate DoorIt is used for electric door, sliding door, etc. With two 6201 integrated bearings.Application: electric door in wheel/sliding door nylon wheel sleeve/iron door with wheel/electric door track wheel/travel wheel/pulleySpecifications:Screw type: M12Color: yellowMaterial: PP+metal Size: 50x70mm Total height: 107mm Package content:2*wheel guideOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm. About UsWe provide good product with best price, we support wholesale order/