Missing original packaging. See photos. The ECO 20810113 375471 Motorised Zone Valve Actuator Head is a 3-port mid-sized valve designed for use with 22mm and 28mm radiators. This corded electric actuator head operates at 220/240V and has an amperage of 22A, making it suitable for controlling heating systems efficiently. The sleek silver colour and electric features add to its functionality and appeal in home heating systems. With the Trident 3 port actuator head model from ECO, this product offers reliable and convenient control over your heating needs.