Foam for under aquarium

[ReefDreamz]

Could anyone provide a link to the exact foam used in this video: He calls it "grey 4 psi foam". Not really looking for alternative suggestions, just trying to locate the source of this exact foam. Thanks!

 

[vetteguy53081]

Its a foam rating and likely 1/2 polystyrene foamYou said you don’t want suggestions
Most aquarists use 1/2”-1” and larger thickness based on aquarium size

 

[ReefDreamz]

I was able to find it: https://www.thefoamfactory.com/closedcellfoam/polyethylene-foam-roll.html

 

[SteveMM62Reef]

It looks like Wedi Board. Long Term Compression Strength (50 years) 0,08 N/mm2 < 2%

Compression Resistance or Compressive Strength at 10% Compression EN 826 0,25 N/mm2

Maybe someone can convert this to American measurements.