Linear Ball Bearing, System of Measurement Inch, Inside Diameter 1 1/2 in, Outside Diameter 2 3/8 in, Self-Alignment Self-Aligning, Overall Length 3 in, Dynamic Load Capacity 3,880 lbf, Material Delrin, Series Super Smart, 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