Machinists Levels Tube, Overall Length 4 in, Accessory Type Machinists Levels Tube/Plug Assembly, Overall Height 1 in, Overall Width 2 in, Compatible with Grainger Part Number 6NAZ2, Compatible with Level Type Machinist's Levels, Material Brass, Color Gray, Compatible with Manufacturer Model Number 98-4, Number of Pieces 1, Thread Size Not Applicable, Voltage Not Applicable