Take aim and fire with King Arms 6mm Biodegradable Airsoft BBs . These high polished .20g BBs are developed for experienced airsoft enthusiasts, and are essential for high-powered skirmish scenarios. For use in Spring, Gas, and Electric airsoft guns. Features: 6mm airsoft BBs 5.95 +/- 0.01 mm Diameter 5000 Rds White Developed for Experienced Players Decomposes within weeks in a compost environment at 60 degrees, or 2-3 years in the ground with a temperature of 10 degrees 100% Biodegradable Environment Friendly