AP-4 & AP-8 Air Pump Replacement Diaphragm kit

Each kit includes two rubber diaphragms. The AP-4 requires one replacement kit and the AP-8 requires two replacement kits if replacing the diaphragms on the AP-4 or AP-8 Supreme Aquarium Oxy-Flow Air Pumps or Supreme Hydro Oxy-Flo Air Pumps.