A bottle of 3300 BBs which are constructed from PLA (Polyactide), have a tolerance of 0.01mm +/- for excellent consistency, and go through a multi-polish process to ensure a perfect finish. They are manufactured to be as accurate as possible, with less than 5% air bubbles for a very precise centre of gravity which will help achieve consistency when firing. They are supplied in a square screw top bottle and have an individual weight of 0.25g