1.750" overall spindle length is 2.550", from bearing shoulder to idler plate surface is 1.750" and is designed for a .625" idler pulley bolt.
2.750" overall spindle length is 3.550", from bearing shoulder to idler plate surface is 2.750" and is designed for a .625" idler pulley bolt.
Spindle is designed for double single row bearings with a I.D. of .980".
Also included in the assm. is a heavy duty heat treated cad plated steel washer that is .080" thick, a 5/8-18" heat treated steel bolt. T-nut is not included in this assm.