Dura Vent 4" Oval Type B Gas Firestop Spacer
Dura Vent 4" Oval Type B Gas Firestop Spacer 4" Oval Firestop Spacer for Oval Type B Gas Vent, Dura-Vent gas vent pipe and accessories assemble quickly with push together connections. Type B Gas Vents are for venting listed natural gas or liquid propane Category I appliances.
