? Exquisite appearance design, all-aluminum alloy shell
? Overload protection to prevent motor overload
? The chain is made of carbon steel (or stainless steel) with anti-corrosion treatment, suitable for a long-term humid environment
? Itinerary and push-pull force can be customized according to customers' needs
? Test more than 30,000 cycles
link:https://www.heinda-cn.com/automatic-window-system/single-chain-window-opener.html