It attaches and opens with the screw-type lifters that were original equipment on the trailer. The lifters are not included. You will receive the Lexan cover only.

Take a look at the MORE PHOTOS button to see how it attaches to your hardware and trailer. We do not sell the gasket, and we now recommend a 1/2" thick hardware store gasket attached to the top rim of your opening rather than on the cover.

NOTE: Because our covers are made of translucent white Lexan, they let more light into your trailer the the original fiberglass versions.

1. Remove the lifter mounting bracket from the wall of the vent opening.
2. This step is for those with openings less than 25" long.  The top portion of the bracket is crescent shaped.  Grind it down to make it a deeper crescent.  You may need to grind it 1/8" to 1/4" deeper.  This will give the lifter the ability to angle outward enough to reach the Astradome at the flat mounting points.
3. Fasten the top hinge of the lifter to the very inside edge of the flat mounting surface of the Astradome using 3 truss head or pan head machine screws (the flatter the head, the better so it doesn't interfere with the closed hinge).  Use washers and self-locking hex nuts on top of the dome.
4. Reinstall the lifter in the wall of the vent opening.