Replace the worn out pivot cups in your Ace AF1 Trucks with this AF1 pivot cup kit! These are located in the base of your truck and provide a secure spot for your hanger to attach to. Daily turning and pivoting on your skateboard takes a toll on each cup. Constructed with hand-poured, durable 96a durometer performance urethane, these cups are built to last. This kit includes two cups which is enough to service both trucks.