SELECT – Permissible rare, individual, healthy branches up to 8 mm. The sapwood is not allowed. Natural, rare, fissures minimum allowable ends. There are color deviations due to the natural wood pattern.
Nature – Permissible healthy twigs up to 25-35 mm and 15-25 mm Filled up. Allowable minimum amount of up to 5% of white. Natural, rare and 20 mm long and 2 mm wide at the ends of cracks.
RUSTIC – Permissible natural branches up to 60 mm and 50 mm Filled. Unlimited number of healthy twigs. Branching emphasizes wood vibrancy permissible white and 10%. Naturally occurring and plug fissures are permitted up to 20 cm long and 5 mm wide.