(Top-hanging Outside Window )Heavy Double Chain El

window actuator ♥ Oxidation treatment of Aluminum Alloy Shell, silver color (color can be customized) ♥ The chain made from high quality steel with strong thrust,especially suitable for high load ♥ Double chain can be applicable to heavy or widen windows ♥ With the electronic overload protection device ♥ With a built-in synchronization device , can be opened the wide windows easily ♥ The locking load : 1000N ♥ Protection grade : IP32 ♥ Size : 845x54x45mm 1250x54x45mm 1500x54x45mm If you want toknow more informations ,please visit our website or contact us at any time, we would be honoured to establish the business relationship with you !