These parts are used to adapt capra or scx10 springs to fit under the body of the SCX6 shocks. There is an upper sleeve that fits tightly to the body and a lower sleeve that fits over the lower shock eye. *these specific models are based off of the black and white tension springs. 

There are 2 different uppers with different spring bucket diameters for the softer and harder springs, they do fit tightly and you will “turn” the spring into the cup as you install it. 

There are also 2 different lowers, I made these so you can add preload if you like. Or you can just stack some O-rings on the lower to add preload as desired.