ITEM NAME:Electric Motor 6203RS 17 x 40 x 12mm Deep Groove Ball Wheel Bearing A6J4 Electric Motor 6203RS 17 x 40 x 12mm Deep Groove Ball Wheel Bearing A6J4 Product Name : Deep Groove Ball Bearing;Type : 6203RS Materal : Metal, Rubber;Outer Diameter : 40mm/ 1.57" Inner Diameter : 17mm/ 0.66";Thickness : 12mm/ 0.47" Color : Silver Tone, Black;Weight : 67g The inner diameter is 17mm, outer diameter is 40mm and the width is 12mm, could be used in many applications. Closed with 2 rubber sealed to protect the bearing from dust or any possible contamination. Used widely in industrial machine, electric motor Package Content : 1 x Deep Groove Ball Bearing Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.