Pickup Truck Roll Top Slimline II Load Bed Rack Kit 1475 x

No Weld Pickup Truck Bed Racks and Cross Bars t slot bed rack does anyone know the dimension of bed to cabin roof, so one could figure out which rack height would work best for there needs? I found this tslot extruded aluminum Toyota Tundra Utility Rails - $2, USD, Toyota Tundra Bed Clamps - $2, USD, Toyota Tundra T-Slot Tonneau Covers (For Retrax and Roll'n'Lock

tycopro slot cars THIS IS A T-SLOT NUT YOU CAN USE IT THEM TO MOUNT STUFF TO THE BE RAILS THIS IS SLOD AT GRAINGER