Manufactured out of 2.5mm Black (twisted) knoted polyethylene, and come complete with a quad stitched PVC headband and taped sides and base. Length: 12.8m. Height: 1.07m. TN-20 TN-20Manufactured out of 2mm Black (twisted) knoted polyethylene, and come complete with a quad stitched PVC headband and taped sides and base. Length: 12.8m. Height: 1.07m.