Hard transport case* - Code SA-55
• Air and water tight case that provides the Surtronic Duo with 
extra protection for safe storage and/or transportation.
calibration standard - Code CS-20
• For calibrating and checking the Surtronic Duo instrument..
 - Ra 5.81 µm (229 µin)
Magnetic base* - Code SA-41
• Lightweight compact base specially designed to allow for 
measurements in multiple orientations including upside down on 
metallic surfaces.
* Not supplied as standard with Surtronic Duo