Used SGI Bio Reactor Type SET20CI. Approximately 12" diameter X 12" straight side. Approximately 20 liters / 6 gallons. T316 Stainless steel contacts. Polished. Internal rated 300 Kpa (45 Psi) @ 130 degrees C. Jacket rated 400 Kpa (60 psi) @ 130 degrees C. Serial number 5942. NB 4737.