Dual Drive Shaft, 5/8" OD with a 3/16" key way on both sides.

Dual Drive Shaft, 5/8" OD x 5.25" long, end to end with a 3/16" key way on both sides. 

The shaft is zinc plated and have four snap rings groves to hold your sprocket or pulley on the shaft.

For the 18.75 to 1 and 16.07 to 1 reduction gearbox.