For sale, a high precision arc protractor for cartridge alignment.
This protractor is made of 3mm High Glossy Black Acrylic Perspex, high-precision laser cut and engraved.
The arc protractor is the most accurate protractors for cartridge alignment; this one is designed for the following Audiocraft/Ultracraft tonearms:
AC-400
AC-400MkII
AC-400C
AC-4000
AC-4400
The geometric features are compliant with Audiocraft/Ultracraft specifications; see the first picture.
 
It is supplied with detailed instructions.
We also make custom protractors to the client's specifications.