Complete, one-piece, jacketed flask with bottom outlet, pressure reactor system designed to perform low to moderate positive pressure reactions, synthesis and catalysis. Reactor capacities range from 500ml to 5000ml and use Ace-Threds to achieve a leak-tight system. One-piece design features a 25mm center opening and has a higher allowable pressure rating than our two-piece design. Rated 45 PSI at 100 Degrees C. Bottom outlet has 28/15 O-Ring ball joint connection. Jacket inlet/outlets have 28/15 O-Ring ball joints or Ace-Threds.