Check the listing for details. EasyPro Quick Sink Self Weighted Air Diffuser Assembly – Single Diffuser. Condition: New. Listed at 138.74 USD. EasyPro Quick Sink Self Weighted Air Diffuser Assembly - Single Diffuser Quick Sink, self weighted air diffuser assemblies are designed to be placed at the bottom of a pond or lake. The self weighted design eliminates need for gravel and reduces installation time. The Quick Sink diffuser assembly features round rubber (EPDM) membrane diffusers with thousands of holes which produce small air bubbles when supplied with air from an on shore compressor. These bubbles rise to the surface and create circulation that helps destratify and aerate the water body. Recommended air flow .8-3 cfmLow maintenance 10" rubber membraneSelf weighted, powder coated steel baseIncludes inlet air fittings for 3/8", 1/2" or 5/8" ID tubingDesigned for fresh water applicationsDimensions: 15" x 18" x 4.25" tall Webb's eBay Store Store Home Store Policies Feedback Shipping Most orders are shipped from our warehouse in Maryland. We warehouse over 95% of the items that we offer, which is a key to our quick order turn-around. Some orders are drop shipped directly from our manufacturer's in various states within the continental US. All orders are shipped via either UPS or FedEx therefore we cannot deliver to PO boxes, please supply a physical address to which we can ship your order. Payment We accept PayPal and the following credit cards: Visa, MasterCard, American Express, and Discover. Please feel free to call with any questions.