Linear Ball Bearing, System of Measurement Inch, Inside Diameter 3/8 in, Outside Diameter 5/8 in, Self-Alignment Self-Aligning, Overall Length 7/8 in, Dynamic Load Capacity 100 lbf, Material Delrin/Steel, Series Super, Steady State Speed 10 fps, Maximum Operating Temperature 185 Degrees F, Minimum Operating Temperature 0 Degrees F, Inside Diameter Tolerance +/-0.001 in, Accelerated Speed 450 fps, Outside Diameter Tolerance +/-0.00045 in