Parts are compatible with Traxxas X-Maxx 8s Input Shaft 

This will make the shaft ready to fit big 1.5 mod gears with a 8mm id hole. 

If you have a 6s X-Maxx you will need a 8s input shaft part number 7786x

Please Note: Gears are not included in the sale.

Contents: 

8mm Spacer - Stainless Steel 

7.5mm x 2.2 mm approx Steel Pin