Dual tubing connector assembly sets, For hoses with inner Ø 13 mm

Suitable for retrofitting vacuum flasks or carboys with 53 mm or 83 mm screw caps. To do so, two holes must be made in the screw cap and the hose connectors fitted inside them. For hoses with inner Ø 6 or 13 mm. 53 mm screw caps can only be fitted with 6 mm hose connectors, 83 mm screw caps with 6 mm and/or 13 mm hose connectors.