“Greyboard” in the U.S. ?

Hello, is the “Greyboard“ that Phil refers to in many videos (I.e. the watch case video for one example) obtainable in the United States? Is it called by a different name? Where have you found it?

This is for parts that require “rigidity“ on some projects - but, I believe it is advisable for creating patterns as well - which is what I am after right now. Something more durable that may have more longevity.

If not “Greyboard” Anybody have suggestions for what they like to use?

Thank you!!!

Gus