Browning 2 Groove Sheave with Bearing Installed Part# 2Q5V71 New Flyer Bus Idler Pulley Part#115838 The ID if the installed bearing is 1.965" - 50mm. New old stock a couple of pulleys in my inventory do not have boxes. You may get a box you may not. Please do your own research to verify this is the right part for your application. Policies and FAQ's Check out my other items! Be sure to add me to your favorites list!