Impeccable Culinary Objects (ICO) Replacement Silicon Gasket for of Whipped Cream Dispenser, White Compatible with all major brands of cream whipper, including iSi, Whip-It!, Useful., VonShef, Mastrad, Mosa, and more Replacement silicon gasket for placement underneath your whipper's headset Guaranteed top quality silicon Prevents N2O gas from leaking out of the top of your cream whipper Do not subject to cold (cold or frozen gaskets can crack or shatter)