This is a pair of smart sealing assembly for tube vacuum furnace to tighten both ends without any welding .

•Made of Stainless Steel with double high temperature silicon O-rings on each flange

•One end flange has a vacuum meter with valve , and another end  has valve

•Seal tube by tighten screws on the flange without any welding

•1/4" in diameter vacuum sealing assembly will connect with 1/4" rubber hose

•Excellent for any type of tubing:  ceramic, glass, quartz and steel pipe.