Stainless Steel With a dimple jacketed 4 Bar Working pressure Internal chamber Size 2,600 mm dia x 3,000 mm deep with dish top and bottom, bottom with 2 off 50 dia outlets top with rectangular manway 550 mm x 660 mm with 260 mm dia , 150 mm dia, 150mm dia sight glass and 4 off 25mm dia inlets mounted on three legs to give 600 mm ground clearance. Overall height 4,600 mm. made by A. Leeving Enschede BV [ Stainless Steel Manways missing not included within the as is price]