Check the listing for details. Pondmaster Model AP-20 Air Pump Replacement Diaphragm Rebuild Kit - Part # 14525. Condition: New. Listed at 14.99 USD. Diaphragm Rebuild Kit for Danner Pondmaster and Supreme Air Pump - AP-20 - 14525NOTE: Photo of air pump is for reference only, this listing is for the rebuild kit only Specifications: Manufacturer's Part # 14525Complete Rebuild Kit for Pondmaster, Supreme, Supreme Hydroponics - AP-20 to fix one unitThis rebuild kit will fit the following units: AP-20 (Model 04520) Have Questions? We have answers! Use the "Contact Seller" link above! Why Buy from Us?At Graystone Creations we promise you the following:Fair and Honest Pricing Dedicated customer support before, during, and after the sale Quick and professional shipment of your orderSHIPPING - Most items ship the same or next day. Occasionally orders will take longer depending upon the item or which warehouse it will need to ship from. Thank you for your interest and we look forward to assisting you further. Graystone Creations