Glass Manifold with #15 Ace-Thred at either end To allow switching 5853 vacuum connection to left or right side. Supplied with three or five, 4mm straight bore PTFE stopcock sampling ports. (Additional ports can be ordered.) Overall length of glass manifold is 230mm. Complete item consists of 8763 Glass Manifold, 5846-48 End Plug with FETFE O-Ring, and 5853-18 and 5853-21 Ace-Safe Connector with bushing for 1/4" or 1/2" tubing connection.