Altogether there are 39 classes divided into 7 main levels; A1, A2, B, C, D, E and F where A1 is the best and F are for products and materials not classified.
Kokku on 39 klassi, mis on jaotatud seitsmeks põhitasandiks: A1, A2, B, C, D, E ja F, kus A1 on parim ning F märgib tooteid ja materjale, mis ei vasta nõuetele.