This Magnum rubber band gun ammo is perfect for both kids and adults who love rubber band gun games. Whether you're having a friendly backyard shoot - out or just practicing your aim, these rubber bands are a must - have. The ammo comes in four different colors (Red, Green, Blue, Yellow) and four bag sizes (1oz, 4oz, 8oz, 16oz). The 4oz bag has about 100 or more rubber bands. Remember, the bands are sold by weight, so the bigger the size, the fewer bands per bag. It's easy to use and will make your rubber band gun perform at its best.