For all heating, air conditioning and venting where rigid pipe is required. The 4 galvanized adjustable elbow is used to make angular or gradual turns. It can be adjusted to form an angle from 0° to 90°. Highly durable, 26 gauge construction features a crimped end to easily assemble to furnace pipe and fittings of same diameter. Stove pipe elbows adjustable galvanized 26 gauge size 4 inchAdjusts from straight through 90 degreeAdjustable 4 piece elbow