Copper Coupling (or coupler) is a very short length of pipe or tube used in piping or plumbing, with a socket at one or both ends that allows two pipes or tubes to be joined together.
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ACRYLIC DUCT SEALANT
Idenden High Velocity Acrylic Duct Sealant is designed for use on both low and high velocity heating and air conditioning ducts. It forms a tough,