G&P Tools Q-CS2 1” Retrofit Aqua Wrench Cord Stopper for existing 120V Installation. Eliminate water leaks at the pool light. Stop wondering if that light niche conduit is sealed; use Cord Stopper on old or new installations. Molded rubber stoppers fit snuggly around cords to seal the light niche without messy silicone or putty. Retrofit is split to make below waterline repair on a leaking light easy. Cord Stopper makes light replacement fast & easy!