Jacketed, cylindrical kilo scale reaction flasks featuring removable flush seal valves, beaded pipe jacket inlet/outlets and bottom drain. Double-sided graduations facilitate left or right hand orientation. All flask sizes thru 50 liter have all glass lower seals, larger flasks incorporate silicone lower seals. Low aspect ratio saves hood space. Temp range: -60°C to 200°C. Max jacket pressure: 8 psig.