uxcell a11111600ux0002 Amico 5 Pcs 608RS 8 x 22 x 7mm Shield Deep Groove Ball Bearings Product name : ball bearing; a11111600ux0002 : 608RS Type : miniature; material : carbon steel, rubber Color : Silver Tone, black; internal diameter : 8mm Outside diameter : 22mm;thickness : 7mm Net weight : 57.4G;package content : 5 x ball bearings