These bushings are for the XK-4 DA 45 Sure-grip & Invader DA45 plates.
The set of 8 comes with 4 top and 4 bottom bushings as they are different shapes. (so 4 conical-domed and 4 barrel) in a pack
The Sure Grip new Super cushions are made of an advanced high rebound clear urethane that provides greater turning while increasing the return energy upon compression.
These cushions are state of the art and incorporate an entirely new type of high rebound urethane, unlike anything we have ever made.
Blue - 72a extra soft
Yellow - 79a soft
Purple - 85a med
Red - 93a hard