Luxus Grade Blended nicely color, mostly found in the tropical wood species		Classic Grade Little color variation and fine knots are found on the boards
Merbau Luxus	Kempas Luxus	Maple Classic maple very calm surface small knots (up to 10mm) are allowed	White Oak Classic
Natural Grade Some color variation among lamellas, small sound knots, and some sapwood appear on the boards		Active Grade Sound and dead knots, brown heart (in Maple and Beech), are allowed
Maple Natural lively surface Firm and healthy knots are allowed	White Oak Natural	Maple Active	White Oak Active