I had this custom made for my SuperCrew on the 5 1/2' bed. Ask me for the exact specifications and I can send you the spec sheet. It's made with steel tubes with heavy duty, weatherproof rollers. Will hold 1600+lbs.
Use it under your tonneau to easily make use of the entire bed or load it with extraordinarily heavy items and push it into the bed with a single finger. Has a auto-locking mechanism to hold it completely open or shut.
Height from bed to top of tray is 2 7/8". Included is a OEM rubber bed mat that was custom cut to fit exactly over the aluminum tray. The tray is "folded" 2 inches at the window-side of the bed to keep things from rolling off. It's also "folded" 1 inch on the two sides. It doesn't have a lip at the front... instead, I rolled that fold downward to strengthen the tray even more.
Works like new. The rollers don't stick... nothing is wrong with this. I traded my F150 for a Tahoe and simply asked them if I could take it off before I traded the vehicle in. It's been a HUGE asset.
Asking $650. Local pickup in DFW only (it's heavy and unless you want to arrange freight shipping then local pickup is the best option).
You can find additional pics (I didn't post them here b/c I wanted these to have my screen name attached to meet the rules) by checking out my original thread from a couple years ago. This is the real deal.
Wow that's cool. If I had a topper I'd seriously consider something like this!
They are the bomb, and you don't need a topper to appreciate not climbing into the back of your truck. You need to remove the stripper pole if you have one (or shim up for clearance), but then you won't need it anyway.