Float Valve and Silicone Sealing Caps are Essential for Pressure Cooker to Work Under Normal Situation. Float valve and Silicone Caps Set for Pot model Duo60,Duo80, Duo Plus 8, Lux 8 Quart, Ultra 60 and Electric Pressure Cooker, Compatible. The Silicone Sealing Caps is Often Washed Off, Leaving the Floater Loose and Make Pressure Cooker Unusable. Replacement Floater Valves and Sealer Rings are Your Best Solution for this Problem. Floater Inserts Into the Lid from Outside to Inside, Silicone Sealing Caps Locks the Floater from Inside Please.