Hard coated Speedglas outside cover lenses for your Speedglas 9002 welding helmet to help prevent scratches, wear and tear. These outside cover lenses last around twice as long as the standard Speedglas outside cover lenses - so depending on your specific application they could save you money in the long run! Come standard in a pack of 10. Plate Marking = 420100. Eweld is your Australian online welding helmet shop.