TELE-HEIGHT comes in a case as shown left, being 2-1/4" x 4-1/4".
size is as lower left image.
handy little tool helps to figure quickly and accurately the height of
cables, trees, poles, or buildings. Looking at the diagram below, the lineman
moves back and forth until the bubble is in the center of the hair-line
and the cable is in the center of the scope. Distance A + B = the height