Equipment Weight Bag for anchoring the teeter, tire or jumps from getting knocked down or blown over. The twin tube design lets you lay it flat, fold over equipment or stand upright. Made of the same material and high quality construction as our Thunder Tunnel bags: UV-resistant, heavy weight 18oz coated vinyl sewn with SunGuard UV-resistant thread. It has a 2” (5cm) wide outdoor-rated Velcro fastener and 1” heavy-duty webbing sewn down the bag middle. two tubes. Bag ends have a carrying handle for easy handling. Measures 16” (41cm) square; tubes are 7” (18cm) wide. Wide 4” (10cm) flaps fold into the inside to hold the sand in and reduce water penetration. Bags are shipped empty and at 3/4 full of sand weigh 20 lb (9kg). To use, fill each tube with sand or pea gravel, fold in the flaps and fasten with the Velcro strip. Assorted colors. Custom colors are available on request.