You gain two more square donuts with this expansion pack. Try buying a different color to create your own custom look. One expansion pack plus the original Boner Kit will give you four square donuts total.
Features:
Super stretchable yet firm TPR
Stackable and compatible with the Boner Kit
Material: Super stretchable yet firm TPR
Dimensions
Ball Ring Exterior: 1.3 by 1.3 in.
Ball Ring Interior: .9 by .9 in.