Description:10pcs 624ZZ 4x13x7mm HCS U Groove Sealed Ball Bearings Guide Pulley Ball Bearings<br>Specification:Material: high carbon steel<br>          Type       624ZZ           Inner Diameter       4mm           Outer Diameter       13mm           Thickness       7mm           Width       4.5mm           Depth       1.7mm   <br><br> Feature:<br> U groove Sealed Ball Bearings<br> This item is ordinary precision， adaptation to low speed， low load applications.<br>  <br> Package Included:<br> 10x  U groove Sealed Ball Bearings  More Details: