These high quality 6 mm airsoft BBs have extreme precision in terms of size and weights. They are double polished and super slick. They also have high hardness for jam-free AEG and gas powered airsoft guns. Quantity per bag are 0. 12, 0. 20: 5, 000 rounds; 0. 25: 4, 000 rounds; 0. 30, 0. 36 and 0. 38: 3, 000 rounds.