Selkirk-Metalbest Metalbest RV 3" Type B Gas Vent Quick Grip UL Listed Firestop with Spacer Ring

3" Type B Gas Vent Quick Grip UL Listed Firestop with Spacer Ring from the RV CollectionThis spacer is required when penetrating combustible materials with the gas vent system. It serves to protect the combustible wall material and is UL-Listed. It includes an attached spacer ring to ensure 1" clearance to combustibles.The RV series offers round gas vent pipe and fittings for residential, commercial and industrial applications. It features a snap together, non-positional lock system, die formed ends, and...