DRAFT SEALHelps to reduce drafts, vapors and sound transmissions through exterior walls. Works with all standard non-metallic boxes. Green Ring easily identifiable after dry wall install. Eliminates need for caulking & sealants. Complies with the IECC & LEED for envelope sealing. Meets NEMA OS 4 standards.Madison Electric is now part of the Southwire family. Product packaging may vary.