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This adapter has a 14/10 inner joint and #7 Chem-Thread to permit insertion of 5-7 mm OD thermometers and bleed tubes. A side hose conection is used for vacuum pull-off. It comes supplied complete with a compression cap (CG-352-01) and Viton o-ring (CG-305-107). This is a component of the Minum-Ware® basic kit (MW-16-01).