The Madbull Precision BB series all have a standard size of 5.95 +/- 0.01mm with precision lapping and polishing processes. Each bottle contains 4000rds.
The BBs are made by certified Japan P-Life Bio Materials (FDA Approved / US Patent). The natural smell of P-Life will prevent approach from children and animals. For all human Being's sake, save the environment, save the world!
The 0.25g Bio-degradable BBs are light-grey in color.