For connecting inert gas and vacuum sources. Supplied with 4mm PTFE vacuum valves for grease-free operation. Fabricated from larger 3/4" medium wall tubing. Upper left and lower right beams are open. Ports are spaced 100mm apart and have 3/8" serrated hose connections. Rod braces are located between each bank for added strength. The valves are sealed at a 45° angle to allow easier manipulation.