Knowledge Base:  

Knowledge Base : 3-ply
Page of 1
On other sites, I'm seeing mailing tube thicknesses referred to as "3-ply". What does that mean?
The most common wall thickness for a "standard" mailing tube is .060" (1/16"). Paper tubes are made with "layers" or "plies" of paper. A generic assumption would be to assume a mailing tube with a .06