Just an FYI, TrailAir hasn't made a product in a number of years. Lippert bought them out and carries on the name. I believe that Lippert is now switching the TrailAir name over to the Road Armor name, but no matter what it's still coming out of a Lippert Plant, so they must have under bid Mor/ryde.
A couple of years ago DRV switched to Lippert/TrailAir Pin Boxes, but it didn't take DRV long before returning to Mor/ryde.
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.