Selkirk 4 in. Steel Adjustable 45/60-Degree Gas Vent Elbow

The 4 in. Steel Adjustable 45/60° Gas Vent Elbow is a Type B fitting that's deal for providing an offset around rafters, joists and other construction obstacles. It has a durable, galvanized-steel outer pipe with internal spacing bends that provide a uniform insulating air space between pipe walls. Each end is die-formed for uniform sizing and strong, easy-to-connect joints. A lock tab feature allows installation without the use of sheet-metal screws. It is tested and UL listed for safety in accordance with NFPA standards.