Heavy duty rolling storage cart for JumpSport Fitness Trampolines, textured black. Stack up to 10 39” JumpSport Fitness Trampolines on this cart for easy portability and storage. Hexagonal shape, one leg in each corner, makes it very stable. One wheel has a brake so cart will stay in place. Six 3-inch diameter coasters roll smoothly on carpet and fitness flooring. Bumper guard to protect walls. Assembly required.