The silicone cap gaskets may wear out over time due to heat and pressure in the cooker. You might also lose one when washing the lid, so it is good to have spare parts on hand. The floater and sealer are essential for the pressure cooker to function properly. The floater inserts into the lid from the outside to the inside; the sealer locks the floater from the inside, keeping it in place. Color: As shown Material: Metal Package Contents: 10 x Float valves 30 x Float caps Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the actual item. Measurement may vary by +/- 1-3 cm.