Duct clamps with rubber inlay diameter 560 mm. Pipe clamps are two-piece circular pipe clamps fastened together with a pair of steel bolts. They are used for suspending a spiral duct in the ventilation system. The width is 20 mm for Dia 80 – 400 mm and 25 mm above Dia 400 mm and the thickness is 1.8 mm under Dia 400 mm and 2.5mm above Dia 400 mm. To be used in combination with threaded rods.