... buzzer alarm, control cabinet and limit switch etc spring, lead rail or activity leadrail, door opener, motor. 10). ... and limit switch etc. LY12 aluminum alloy for lead rail,Door's parameter WidthEffective highSolidwidthTop spaceColumnDepthThickness of gate ... door, Rolling shutter door, Automatic door, Sliding door, Industrial sectional door, Entrance door, Perspective door, Fireproof door, Fireproof ...