Product Features: - Made of canvas material, with double-layer metal zipper and nylon handle of two layers built-in metal plate; with two independent pouches, each can be loaded with sand or heavy objects of about 2.5kg - The total length is about 48cm, width 24cm, weight about 210g - Mainly used for studio or outdoor, press and hold the bottom of light stand or tripod to maintain balance, or hung onto boom arm to maintain balance; or placed at the bottom of lens for shock absorption; multiple sandbags can be used in combination.