Prison Barrier material:pvc coated,galvanized can be used in highway,road, ... 10.6mm19,20,21,221/2" x 1/2"12.7mm x 12.7mm16,17,18,19,20,21,22,235/8 ... ,18,19,20,211" x 1/2"25.4mm x 12.7mm16,17,18,19,20,211-1/2" x 1 ... waterproof paper in rolls. Custom packing available at request. Prison Barrier