Lancer Tactical gives you a rundown of their BBs available for your airsoft needs... "Check out the new Lancer Tactical BBs! Available in 0.12g, 0.20g, and 0.25g and in Biodegradable 0.15g, 0.20g, 0.25g, 0.28g, 0.30g, 0.36g, and 0.40g! Look for these BBs at your favorite airsoft retailer!"