The 
NUPROL RZR Bio-BB 3500 rounds 0.20g
 are premium-grade, biodegradable airsoft BBs ideal for CQB environments and general skirmishing. 
 
Product Specifications
According to NUPROL's official website, the 
RZR Bio-BBs
 are manufactured to high standards in Taiwan. 
Weight: 0.20g
Quantity: Approximately 3500 rounds per bottle
Material: Biodegradable polymer, meeting international standard ISO 14855-1:2012
Diameter: 5.95 mm with a low tolerance of +/- 0.01 mm
Finish: Triple polished for enhanced flight and smooth feeding
Recommended Use: Ideal for standard AEGs and pistols, especially in CQB (Close Quarters Battle) and indoor environments, offering effective short-range accuracy up to 30m.