The jacketed flask for pressure reactor systems designed to perform low to moderate positive pressure reactions, synthesis and catalysis. Reactor flask capacity is 500 ml and uses Ace-Threds to achieve a leak-tight system. One-piece design features a 25 mm center opening and has a higher allowable pressure rating than Ace Glass two-piece design. Rated 45 PSI at 100 degrees centigrade. Jacket has #11 Ace-Thred connections on inlet/outlet, use 3/8" tubing.