TOOGOO(R) 6203Z Deep Groove Double Metal Shields Metric Ball Bearing 17 x 40 x 12mm Product Name : Deep Groove Ball Bearing;Bearing Model : 6203-Z Z Bearing Standard(mm) : 4 x 13 x 5;Inner Diameter : 17mm/ 0.7" Outsde Diameter : 40mm/1.6";Width : 12mm/0.5" Material : Metal;Color : Silver Tone Weight : 61g;Package Content : 1 x Deep Groove Ball Bearings