Elite Force Airsoft Bio BBs are specially engineered for highest performance and best biodegradability. EF BBs are perfect for outdoor airsoft scenario tactical and military training and skirmish. Elite Force Airsoft BBs are the highest quality Bio BBs currently on the market, and are designed for the serious player who demands serious airsoft ammo for their high performance airsoft guns. Product Features .20 Gram 10,000CT Biodegradable Material