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.

STREAMER AIR PURIFIER (40 TYPE)
MC40UVM6 UP TO 31 SQM. ODORS & ALLERGENS ELIMINATEDStreamer decomposes odours and allergens, etc., with high speed electrons that have a powerful ability to oxidize.DUST