|Coating:||Aluminum with protective overcoat per MIL-M-13508|
|Accuracy:||±5 arc sec. See Note 1|
|Calibration:||Given to 1/10 arc sec of actual angle with probable error of no more than 0.5 arc sec. See Note 2|
|Spindle Hole Diameter:||0.766 inch (20 mm)|
|Spindle Mounting Base:||Flat to 0.000 050 inch and square to axis of polygon within 20 arc sec|
|Weight:||1.75 lbs (0.8 kg)|
|Shipping Weight:||5 lbs (2.3 kg)|
NOTE 1:Angular dimensions for normals to reflecting surfaces are held to ±5 arc seconds. Pyramid error of any face with respect to other faces does not exceed 8 arc seconds. Polygons having higher accuracies are available.
NOTE 2:Calibration sheets are included giving readings between adjoining faces and from degrees to all faces. Calibration is valid when the faces are parallel to the axis of rotation within 10 arc seconds.