Adjustable weight: The interior can be filled with heavy objects such as sand and stones, and weighted according to needs to meet the needs of different photoshoots scene Durability: Oxford cloth, ensuring that it is not easily worn or damaged after long time use Studio: Can be used as a counterweight for lamp stands and other equipment to tipping due to equipment vibrate Outdoor photoshoots: Help stabilize lighting and camera equipment in outdoor environment to ensures smooth photoshoots Multifunctionality: Suitable for equipment such as film and televisions light stands, studios, and cantilever crossbars, providing stable balance