5000mL one-piece jacketed pressure reactor with a #25 center neck, (4) #15 and (1) #7 side necks, and a #15 Ace-Thred connection for 3/8 tubing on the jacket inlet/outlet. Reactor system designed to perform low to moderate positive pressure reactions, synthesis and catalysis. Rated at 45psi at 100 degrees Centigrade. FISHER PART 50-972-955