These 6 float valve rubber gaskets fit Duo 3, 5, 6, 8 Quart, Duo Plus 3, 6, 8 Quart, Ultra 3, 6, 8 Quart, Nova Plus 6 Quart, Viva 6 Quart, Smart 6 Quart, Smart WiFi 6 Quart, Lux 3, 8 Quart. NOT Fit Lux 5, 6 Qt.Easy to install and relocate for cleaning, make your disabled cooker work like new.Float valve sealer is part of the lid of a pressure cooker, and is essential for the pressure cooker to workRubber gasket is often washed off, leaving the float vale loose and the pressure cooker unusable because the steam leakLIFETIME WARRANTY - If for any reason you're not SATISFIED, full refund or free replacement is available. Any questions tell us and we will reply you within 12 hours. Warm Tips: Float Sealing Caps are model specific, check your pot model before purchase. Designed for: Duo 3, 5, 6, 8 Quart Duo Plus 3, 6, 8 Quart Ultra 3, 6, 8 Quart Nova Plus 6 Quart Viva 6 Quart Smart 6 Quart Smart WiFi 6 Quart Lux 3, 8 Quart. NOT Fits Lux 5, 6 Qt. Under normal situation, float vale inserts into the lid from outside to inside. Rubber gasket locks the float vale from inside, keeping the float vale in place. The sealer is often washed off, leaving the floater loose and the pressure cooker unusable，This floater and sealer set fits the lids of almost all pressure cooker universally.