... Website:http://www.sichuang-tech.com, DIA45mm, DIA59mm, DIA92mmUsage roller shutter, awning, blind, screen and so onProtect Feature ... 300N. M3) Power supply: 220/230V, 50Hz; 110V, 60Hz4) Manual override, electronic limit switch, RC built-in available5) Somfy similar ... Non-mandrel structure, high strength, wear-resistant, easy hand operation.2. Normal limit screw rod: The unit composes of ...