Wynn's Pre-Emission test Wynn's Diesel Pre-Emission Test Treatment is a strong specially formulated treatment. The highly concentrated formula cleans the entire fuel system, restores combustion efficiency and reduces black exhaust smoke, exhaust emissions and soot Specifications Gender: unisex Packing color: multicolor Contents: 500 ml Package dimensions: 4.8 x 8.8 x 26 cm (lxwxh)