Preamer 20pcs 1.5mm Deep Metal V Groove Guide Pulley Bearing Wheel Rail Ball Bearings Wheel 4x13x6mm

*Wire pulley groove,Wide application

*This item is ordinary precision, adaptation to low speed, low load applications

*steel cage evenly spaces balls for reduced friction, vibration, and noise

*Dimension:(Inside diameter)4mm x (outer diameter)13mm x (thickness)6mm

*Material:High carbon steel.V groove width: 4mm.V groove deepness: 1.5mm