The part of a pump that wears out first is the sleeve. This thick, translucent donut stretches over the open end of most cylinders and gives you a softer seal against the body.
Fits pump cylinders up to 3" / 7.5 cm in diameter
Soft, stretchy and translucent
Cushions the base of the cylinder for a more comfortable seal
By CalExotics, Optimum Series
Check your cylinder diameter before ordering. A drop of water-based lube on the sleeve helps the seal.