ELTRA RM500C500Z5L10X3JR Measuring wheels. 500 ppr Resolution. Size: 500 mm linear extent. Rubberized. With zero pulse. 5 VDC power supply. Line Driver. Rotation speed: 3000 rpm max. 10 mm Shaft diameter. Encosure type: IP 54. J connector output. Radial Direction. Wheels are perfect for industrial applications for measurement of linear movement.