Used Autoclave Engineers Hastelloy C high pressure reactor. Approximately .25 Liter Body rated 6000 psi. SN 81-03319-1 Penn Special PV4941. Top head bolted - rated 5700 psi @ 650 degree F. SN 99151374-1. Built 1999. Top mounted drive with agitator. Electric Jacket. Mounted in stand. Body is approximately 1.75" ID X 6" Deep. Flat top. Dished bottom.