ARE aluminum utility cap, topper for a 6’9” bed. Fits Chevy 2500 n 3500 2014-2018. I bolted on a gap filler piece of metal to fit my 2020 Chevy, so will fit 2020+ Chevy 2500 and 3500 also. Side door open to inside of topper, no shelves. I bought it with no keys so I bought a new lock and key for just the main door. You will have to buy the side door locks if you want it to be fully secure, they are about $100 for each lock. Has a few small dents and I also put in a vent for an outside heater that I used. Can easily be plugged. Has a wiring harness to hook up for LED lights when the doors open.