U Groove Ball Bearing Pulley 10pcs U624ZZ 4x13x7mm Rail Track Slide

1 These bearings are made from high quality carbon steel for durability and long service life 2 They are double shielded to avoid contaminants entering and save lubricant 3 Bearings have 1.8mm deep U groove that generally ride on a rail or track 4 These are bearings that are used in many linear motion systems 5 There comes total 10 pcs bearings which you may use for many different projects

What's in the box
1 x Groove Ball Bearing