Our Universal Chimney Cover Damper Kit is compatible with the Universal Chimney Cover and will fit any chimney flue that a Universal cover fits. The kit is manufactured from 100% 304 stainless steel and includes a high-temperature fiberglass gasket, a damper plate and spring assembly, and a steel cable and ball chain with a weighted handle for easy opening and closing. Our stainless steel Universal Chimney Cover Damper Kit is made in the USA and backed by HY-C's Lifetime Limited Warranty.