Quantity: 4 pieces Shipping weight: 0.4 kg Color: Black and yellow stripes Size: Length 52cm * 24cm (unfolded) Main material: Two-tone Oxford fabric, with an internal supporting steel plate (Note: These sandbags are empty.) Sandbags are useful in the studio to stabilize your lighting equipment. They can be used with poles, light stands, tripods, and more. They come with 8 packs of transparent PP bags. These bags can contain gravel, sand, rocks, or other materials. Place the PP bag inside the sandbag to prevent sand leakage. Combined use of the PP bag and sandbag makes the sandbag more durable and allows for long-term use. Each sandbag is rated to hold up to 9kg. Made from nylon, these sandbags are suitable for both indoor and outdoor use. Key Features: Double openings on both sides, double-layer sandbags. Each side of the sandbag has two layers of zippers (not a single-layer zipper!), which prevents sand from escaping. You can use them to hold sand, gravel, iron, and other objects for on-site photography support, such as lighting boom brackets, pressure rails, stabilizing lighting stands, and magic legs, and even for on-site warnings. Good quality product.