Case of 20 SpecSeal SSP Putty Pads, model SSP4S, from STI Firestop. Each pad is 7-1/4 square and .2" thick. Peel-and-stick installation to the back of electrical outlets to meet fire code and maintain assembly sound rating. Refer to the manufacturer's site for more information on application, installation, UL ratings, STC ratings, and information on LEED points.