By Richard from
Boulder, CO on June 1, 2012
I would recommend this item to a friend.
Gravity Tubes Rock!
Vendor fairs are usually on asphalt so it is not possible to stake down the Canopy. Most fairs require weighted corners to keep the tent from lift off in gusty, windy days. The gravity tubes are ideal for anchoring the legs of the canopy. I've used 5 gal. buckets of sand, cement tubes and barbells - all not easy to manage. the gravity tubes can work with sand, rock, even water to add weight to the tent.
Proseasy to fill, easy to carry.
ConsWell, i first filled them with mountain granite - which is not a smooth rock. it started to cut the bags. I'd recommend round rock or gravel to protect the tube. Also it did not come with directions on how the straps work. None of the ladies could figure them out.