Sandbags are useful in the studio to help stabilize your lighting equipment. These sandbags are high quality and professional. This bag comes empty and can be filled with gravel, sand, rocks, or any other material to add weight. Specification - 2 zipper pouches each - Each pouch: 9 x 10 - Each sandbag rated for 20lbs - Made from nylon material - Heavy duty hangle makes using these sandbags simple - Useful with boom arms, light stands, tripod, etc.