Special Features:

Lexan polycarbonate material, filter material lexan polycarbonate, dimensions (approximate) 0.750 in. Sq. By 0.790 in. High, cap color white, filter color consists of 2 colors, green and white, key cap has a horizontal barrier in lens and a line engraved on top, legend characters shall be centered on key cap, top half of key cap reads "hv on", bottom half reads "hv off", key caps are internally illuminated, note; colored filters used with white key caps are bonded to the inner lens base, the above information covers the requirements for a lens cap and a pushbutton switch, equipment application asr8

Properties:

An item usually marked with letter(s), numeral(s), or other character(s) designed to be attached to a key lever of a typewriter, accounting and calculating machien, office type composing machine keyboard or keyboard, data entry for the purpose of affording fingertip operation.