Light Electric Reaction Jack System
It is applicable to either association's emblem, backcloth, advertisement, scroll, air-brushing, translucent screen, stage units, and others reaction jack.
It has a drum around with AC electric motor, and there is overheat protective relay inside of it. It can be operated either for up, down or cease at any position with accurate and noiseless reaction. The drum is made from high-quality aluminum-alloy, and enjoys good property of corrosion resistant, anti-aging since with anodic oxidation varnishing and keep forms.
You can choose different electric motor with different size drum but same power, and it's safe in utility and convenient in commissioning.  There are drums at Φ70、Φ85、Φ90 with electric motor of 220V, the reaction speed is from 0.03 to 0.1m/s, and height of reaction is from 3m to 10m with weight of 5kg to 80kg