Ace Vacuum Manifold with Firestone Valve, model 876534 is manufactured by Ace Glass. This product is a 5 position vacuum manifold with a Firestone rapid purge valve at one end and 0 to 5mm high-vacuum, easy action PTFE stopcock ports with 3/8 in. O.D. Swagelok® tubing connections. Each connection also has an O-ring groove for use with #11 Ace-Thred.