You are bidding on 1 Lot/24 pieces of Flat Silicone Rubber Gaskets for 6" x 6" Hydrogen Dry Cell. Silicone is the choice material for high temp and provide a great seal for a leak proof assembly of the HHO cell. Why waste your money and time cutting out your own gaskets. This silicone gasket fits perfectly with 6" square plates and custom made to provide the most surface area for HHO production. The thickness is 0.055" or 1.4mm.