The 25002 Set of Air Release Valves with O Rings for Filter Pumps includes 3 packs of valves with a total of 4 pieces. Each valve has a nominal outside diameter of 0.5 inches and is made of plastic. The set also includes O-rings for easy installation and replacement. These valves are designed for use with filter pumps in pools and spas, ensuring smooth operation and maintenance.

Open box includes 3 o-rings and air valves as pictured