2 RPM, Waterproof Aluminum Alloy Electric Greenhouse Frame Shed Roll-up Motor with Accurate Limit Switch, for Greenhouse Ventilation, Automatic Venting24V Roll Up MotorPremium PerformancePractical Limit SwitchPremium Aluminum AlloyTwo Ways to SetupVersatile UsagesProtection Class: IP66,Speed: 3.3 in / 25 x 10.4 x 15.