The Broadfix Flat Packers have been manufactured with a high percentage of post-consumer recycled material. As they are made from plastic they will not swell, shrink or rot, they are completely waterproof. Capable of withstanding higher compressive loads than traditional timber flat packers. This also makes them more economical. They are colour coded depending on size, for easy identification. The Broadfix Flat Packers Mixed Bag has the following specification: Size: 100 x 28mm, Thickness: 1-6mmer of Pieces: 120 Pieces Total (20 each of 1-6mm).