Inner and outer teeth and splines are perfect.

Hub overall width is 3.35".

Hub is 3" tall.

The inner 19 spline surface is 1.10" tooth to tooth and 3" deep.

The outer 48 tooth gear is 3" in diameter with the gear being 1/2" wide. The 2 rings and gear are 1.10" together in length.

That's about all I know. If you can identify the model, please drop me a note.

I don't have any way to test these, but they sure look ready to go. Sold as-is for parts.