Pondmaster Diaphragm Kit for AP-20 14525
Replacement Diaphragm Kit for Pondmaster AP-20 Air Pump Item# 04520, Supreme Aquarium Oxy-Flo AP-20 High Volume Air Pump Item# 04220 and Supreme Hydro Oxy-Flo AP-20 High Volume Air Pump Item# 40522
ASIN: B007R5KBW8