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This adapter is similar to AF-0509 but has a top outer joint of the same size as the lower inner joint, permitting the use of larger needles for multiple penetrations. This adapter also allows for the evacuation and transfer of liquids into another vessel with the same size standard taper joints. Available with 4 mm glass stopcock having a constant pressure retention device or with a CG-436-66 4 mm 1:5 taper PTFE plug.