Complete, one-piece, plain flask, 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 centigrade. Systems are available with mechanical or magnetic stirring.