TOOGOO(R) 5 Pcs 8 x 12 x 3.5mm Double Shielded Deep Groove Ball Bearings MR1280Z Product Name : Deep Groove Ball Bearing;Model : MR1280Z Inner Diameter : 8mm / 0.315'';Outer Diameter : 12mm / 0.472'' Width : 3.5mm / 0.138'';Color : As Picture Show Material : Metal;Net Weight : 5g Package Content : 5 x Deep Groove Ball Bearing