SCplus recommend you the Single-Side Grey Felt Belt Thickness 1.2mm and 1.6mm
which have been used in various industry.
For getting more information please click the link:
https://feltconveyor.com/product/single-side-grey-felt-belt-thickness-1-6mm-4/
https://feltconveyor.com/product/single-side-grey-felt-belt-thickness-1-2mm-5/