Tubular Chipboard provides an ideal combination of light weight and stability. Compared to solid boards, the weight of Tubular Core is reduced by up to 60%. This allows high quality doors to be made without making them heavy. Tubular cores generally have a low thickness swelling, making them specifically apt for doors with delicate surfaces. The special positioning of the particles guarantees a very high impact resistance: Doors with Tubular Core withstand even the greatest impact despite maximum diameter of the tubes.