ECO-MEMO-Extensions are made of structural steel ST37-2 or stainless steel (Cr/Ni-Steel = 1.4301) and are operated via a conical 27-32 mm cap top made of Polyamid glass fibre reinforced plastics with a square steel core. The diameter of the centering cap is 80 mm. An integrated plug on and locking mechanism allows for tool free assembly with any KIT gate valve telescope.