Precision Ball Screw, Number of Starts 2, Travel per Revolution 0.5 in, Ball Screw Diameter 1 in, Overall Length 72 in, Material Steel, Root Diameter 0.88 in, Direction Right Hand, Nominal Ball Diameter 0.156 in, System of Measurement Inch, Compatible Grainger Part Number – Ball Nuts 2LGJ2, Compatible Grainger Part Number – End Blocks 2LGL4