Mercedes Pagoda 230SL , 250SL , 280SL Engine firewall diamond pattern fireproof protecction as original fabrication,  Mercedes part nº 1136822228
High quality 2 piece firewall insulation mat for Mercedes Pagode W113 230SL-250SL / 280SL
This material comes from an OEM material supplier and is absolutely the same as the original part from back then.
Please do not confuse these insulation mats with the cheap reproductions that are often available in stores. 
Material properties: Perfect noise insulation Resistant to heat and pressure Resistant to water, oils, fats and liquids Self-adhesive backing Very clean cut With this insulation cardboard you can significantly reduce your engine noise, heat and vibrations from the engine compartment.