6mm Stokbord Black Recycled Plastic Sheeting 6mm Solway Stokbord Black 6mm thick 8ft x 4ft. Stokbord is manufactured from 100% recycled agricultural plastic which has been llected from UK far, and is used in the agricultural industry for applications such as: Cattle Races, Sheeting Gates & Doors, Lining Buildings, Feed Trailer Floors, Grain Stores, Sheep Races & Pens, and Replacing Tin Sheeting.