<https://ess.elwd.com/product/exell-p20m-hh/#webpage>
<http://schema.org/description>
"ExEll P20M-High Hard is a higher hardness version (BHN 311-352). The higher hardness offers greater mold tool wear resistance to abrasive plastic compounds."
<https://ess.elwd.com/product/exell-p20m-hh/>