For sale, a high-precision arc protractor for cartridge alignment.
This protractor is made of 3mm high-quality acrylic, coated with a yellow film, and high-precision laser-cut and engraved.
The first picture is for reference only; the real protractor looks like the one in the second and third pictures.
 
The arc protractor is the most accurate protractors for cartridge alignment; this one is designed for the following Audio-Technica tonearms:
AT-1001
AT-1003
AT-1005
AT-1007
AT-1009
AT-1010
AT-1100
AT1120
AT1130
The geometric features are compliant with Audio-Technica specifications; see the first picture.
 
It is supplied with detailed instructions.
We also make custom protractors to the client's specifications.