The 
Nuprol RZR - Biodegradable Tracer Airsoft BBs (0.30g)
 are a high-quality ammunition option designed for reliable and consistent performance, particularly in upgraded or high-performance airsoft replicas. 
Key Specifications:
Diameter: 5.95 mm, with a tight tolerance of +/- 0.01 mm, which is ideal for "tightbore" inner barrels (<6.03mm).
Weight: 0.30g, a heavyweight option recommended for outdoor skirmishes as they are less affected by wind and can cut through foliage more effectively than lighter BBs.
Features: They are triple polished for enhanced flight performance and reduced feeding issues. The "tracer" element means they glow green when used with an airsoft tracer unit in dark environments, helping you track your shots.
Environmental: These BBs are biodegradable and meet the internationally recognized ISO standard for Controlled Aerobic Compositing (DIN EN 13432:2000 | ISO 14855-1:2012).