This heavy duty operator is used to manually open or close high level or hard to reach windows and rooflights. The highline Maxi operator is compatible with all Chain openers (WCS100), (WCS150), (WCS175), (SJ138600) and can open up to 380mm. A single Maxi Operator can be used to control individual or multiple chain openers. (Maximum of 6 in total). Supplied with brass stop (WCS720) and handle (WCS277). This operator is designed for use with heavier vents and up to 7 bends/chain openers on the system in total.