Vacuum Oven: The Outer case is Mild Steel painted in Epoxy Powder Coating. The Vacuum chamber is robust Stainless Steel supplied with two stainless steel shelves. The chamber is heated by large area heaters strapped to its outer surface and insulated with super fine mineral wool .The chamber is closed by a thick toughned glass plate sealing into a  neoprene rubber gasket. The door closure is single screw threaded catch. This system provides excellent vacuum performance, a low outer surface temperature and operator safety in the unlikely event of the glass inner door breaking.