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.Deep groove ball bearings, fashionable, slide flexible.
4.The product is outer ring with V shaped pulley bearings, made of plastic,compression wear.
5.Each can load 355kg, good to use and long service life.
6.Suitable for garage doors, transmission machinery pulley.

Specifications:
Material: engineering plastics & bearing steel
Color: Black & Silver
Brand name: BQLZR
Size: 0.6x3x0.8cm/0.24x1.18x0.31"(IDxODxT)
Weight: 112g

Package include:
4 x Bearing Pulley Wheels