This is a package of ten 3.0mm Tungsten Carbide Balls from ACER Racing. FEATURES: Durable and resistant against wear, shock and impact Carbide balls can last for race after race without being replaced Each set of balls is matched for consistent concentricity All balls are Grade 10 INCLUDES: Ten 3.0mm diameter Tungsten Carbide Balls REQUIRES: Installation SPECS: Diameter: 3.0mm jxs 6/09/08 ir/jxs