The Inner Line series of Porta Block offers the best value-for-money on the market. The doors of the Inner Line series are coated with melamine, while internally they have a honeycomb, which is coated with coreboard and MDF, and they stand out for their high resistance to moisture and water. Their skeleton consists of white sawn timber which has been internally reinforced with inert honeycomb. Their frame may be oval, if requested, and their width varies by 5cm. The doors have 3 hinges and a special rubber gasket around the door frame which achieves maximum thermal and acoustic insulation. They come with a three-year warranty and in many different shades.