General description This 50Pcs MR63ZZ Deep Groove Ball Bearing is designed for a variety of applications including electric motors, toys, models, instrumentation, power tools, communication equipment, and fitness equipment. It features a smooth operation, low noise, and a long service life, making it suitable for most customer requirements. Technical specifications Model: MR63ZZ Size: 3 x 6 x 2 mm Material: Bearing steel Color: Silver Package Contents: 50 bearings Measurement allowed error: +/- 1-3 cm