AFM Mica Discs
Highest quality grade V1 mica, 0.21mm (0.0085”) thick. Interleaved, in packages of 10. Can be mounted on AFM/STM discs.
Available in four diameters:0mm (0.39")
12mm (0.47")
15mm (0.59")
20mm (0.79")
See this link for Properties and chemical composition of Mica Grade V1