These are weights for tents. They're convenient because you can fill them with water. I was planning to set up a booth at a flea market, but I never used them and they've been sitting in the storage. ■Brand CAPTAIN STAG Captain Stag ■Condition New, unused, only opened once. ■Description These water weights are convenient for setting up tarps and shades on asphalt or other surfaces where pegs can't be used. It comes with two 5L water tanks, and by filling them with water and setting them in the dedicated body during setup, they become 10kg weights. ● Size...Approx. Width 30 x Depth 18 x Height 14 (cm)