Cargo carrier for roof racks. Size 48" length x 38" width x 24" high Mounts are 24 1/2" apart, but can get creative using nylon straps as I did for slightly different spreads. Also includes u-bolt mounts. Can carry a lot of stuff. Used a few times including a trip to Banff in winter with lots of snow. No leaks. Has minor rodent/raccoon damage at the back which does not impact functionality - see photos.