Ad: K&e cubic precision wyteface optical alignment scale

Subject: K&e cubic precision wyteface optical alignment scale

WYTEFACE Optical Alignment Scales - These scales are made of hardened tool steel with a white matte surface. The paired-line graduation are black to provide maximum contrast.
On the English graduated scales the center of the space between each pair of lines represents 100 in. and is accurately located to within + .001 in. (at 68 degrees F) from the zero end of the scale.

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