General Purpose 4750 Series Vessels are available in volumes of 125 and 200 mL, with temperatures up to 350 °C and maximum pressure of 3000 psi (200 bar). They come standard with a Split Ring closure with 6 compression bolts, and a choice of three different head styles: 1/8″ NPT w/plug, an “A” Socket, or an “A” Socket with Thermocouple. The maximum amount of openings for this head style is two and would be dependent on the size of the ports and the type of fittings required. For the 4750 Series General Purpose Vessels, Parr offers the 4921 Ceramic Fiber Heater.