Use the COUPON CODE: INFLATION2017SALE at CHECKOUT.Rubber for long-lasting, durable performance. Designed to last 3,000 milkings. Sold as a Set of Four. If you have a NuPulse Standard Claw choose the Standard Super or Standard Short inflations. If you have a NuPulse FulFlo Claw choose the FulFlo Super or the FulFlo Short inflations.