Plastic extension tube 2-7/8" ID, 3" OD, 12" length. Also included is the chrome bezel (part number 54), rubber connector (pn 52), two hose clamps (pn 55).Used in 707TW and 707U.Fits on Dome part number TRI-40 .See the instructions for installing the impeller with a 1/16" gap: Trion Impeller Installation (1 page, 70k pdf).
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