This is the 400, 450, 500 Rear Drive Shaft that connects the Engine to the Rear Diff. Approx. 6 1/4" long.
Splined Ends Measure; 19mm O.D and 34.5mm O.D.
This is the parts needed to replace on the HS1000-2 model (Utility w/dump bed).
Many of these parts are the same for the 1000-1, 1000-3 (Sport Model with Bucket Seats)