Atoplee 10pcs 3x10x3mm HCS 603VV Deep V Groove Ball Bearings Pulley Wheels Roller Bearing 100% brand new and high quality V Groove Ball Bearings Pulley Non-standard bearings with groove. Rust resistant, wear resistant, operate smoothly. Ordinary precision, fit for the general usage of low rotation speed and low load, etc. Widely used for wheel alignment, wire rail, pulley.