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This adapter has a #15 O-ring joint with a 0-4mm Chem-Cap® valve at a 90° angle connected to a piece of 9 mm O.D. medium wall tubing which can be used with 3/8" Cajon™ connections or heavy-wall vacuum tubing. The approximate overall height is 100 mm. Each adapter is supplied complete with one CG-305-116 #116 Viton O-ring.