The Dyna-Clamp is an efficient way to secure flex or rigid round duct connections.The stainless steel band can withstand up to 60 PSI, as well as extreme temperature conditions. The band is secured in place at the bridge by a slotted hex head screw. This zinc plated carbon steel screw can be flipped up away from the band to offer a quick release when adjustments are needed. Dyna-Clamps are available in stock sizes ranging from a 7 diameter to 18. Two or more clamps can also be connected together to accommodate duct diameters over 18.