10PCS V Groove Ball Bearing, V1804 Bearing Roller Wheels Bearing Steel Deep V Groove Guide Pulley Rail Ball Bearings Wheel 4x18x8mm for Motor, Toys, Model
Sealed Design : Deep groove ball bearings, fashionable, slide flexible, compression wear. The bearing is well sealed, waterproof and dustproof, safe to use.
V Groove : Bearing has a V groove that generally rides on a guide rail.