Ultra Heavy Duty Tube 4.0 mm TR6Mitas Tubes are made of a high-quality Butyl Compound.Premium valve construction galvanized STEM + 2× washers, metal + rubber cap.New packaging: All our tubes are retailed in individual pouches (packed in nitrogen reach atmosphere for extended shelf life).Thickness: 4.0 mm (UHD: Ultra Heavy Duty).Valve type: TR6. Generic Image: Product sample - please check the parts description and specifications for the individual details.