General description These 100 pieces of steel balls are designed for use in bicycle wheel bearings, serving as a great replacement for broken or missing components. Ideal for bicycle repair, these steel bearing balls ensure smooth operation and longevity. Technical specifications Diameter: 7mm / 0.27 inch Material: Steel Weight: 1400g Package Contents: 100 Pcs x Steel Bearing Balls Measurement allowed error: +/- 1-3 cm