This GL 18 open top cap, with a silicone rubber seal and a bent connector, enables the connection of cooling or vacuum hose by simply screwing onto the GL glass thread instead of forcing tubing over a serrated glass connector.
You May Also Like
This GL 18 open top cap, with a silicone rubber seal and a bent connector, enables the connection of cooling or vacuum hose by simply screwing onto the GL glass thread instead of forcing tubing over a serrated glass connector.
