The box part of the operator is 20" x 16"

With LED light bulbs on the underside of the cap and also along all 4 walls of these caps

Both Sides (Corrosion Protected-Zinc) Heavy Duty Construction for Maximum Durability

As you’ll notice

Heavy-Duty Photo Eye

LiftMaster Std. Duty Adjustable Roller Cage Bearing Hinge - Round Mount, Both Sides (Corrosion Protected-Zinc) Sold in pairs. Single Swing The box part of theLiftMaster Std. Duty Adjustable Roller Cage Bearing Hinge Round Mount, Both Sides (Corrosion Protected Zinc) Serrated Adjustable Yoke Design Provides Fast Easy Adjustability up to . 5 in. Dependable Roller Cage Bearing Design Even Weight Distribution Five Times The Weight Bearing Surface of the Nearest Large Hinge Easy to Fully Lubricate Specifications: Maximum Gate Weight: Up to 1,000 lbs. per pair. Sold in pairs. Pair (2 per Box) 5. 8 lbs. 2. 6 kgs.