Support arm for installation of flue on roof, or to support horizontally, vertically, or diagonaly Adjustable for the angle you need. Made of 1.6mm thick stainless steel. Adjustable from 50cm to 110cm, If longer lengths are required additional extension bars are available. Support rings and arms are available separately, contact us with your requirments. The adjustable support supports the flue from moving sideways (four directions) If you also need to support you flue from moving up and down. After you have positioned your flue and support, you may need to drill a hole for a screw in two places. (near the existing screws).