Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.The guiding wheels are made of PP steel, wear-resistant and durable. 4.Easy to install: Screw is M12, built-in 6201 bearings, easy to install. 5.Widely used in electric door upper wheel, translation door nylon clamping wheel, iron door leaning wheel, electric door guide wheel, track wheel, pulley, etc. 6.The surface is smooth and comfortable, wont hurt your hands. .
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