Superior - Horizontal Firestop (Flex) - 10 Pack - SF4.5HF-10

Superior - Horizontal Firestop (Flex) - 10 Pack - SF4.5HF-10. It provides a premium accessory for use with your gas fireplace. Featuring heavy-duty galvanized steel construction, this unit has been built to last. These firestops help maintain proper clearance when passing pipe through a combustible wall. Designed for 4.5-inch inner diameter and a 7.5-inch outer diameter venting systems, this piece is an ideal size for many applications.