Product Overview Pack of ten hard-coated replacement outside cover lenses to suit the 3M Speedglas Welding Helmet Series 9100. Essential for the care & maintenance of your 3M Speedglas 9100 welding helmet Protects the outside of your Speedglas 9100XXi welding lens from sparks and splatter Scratch-resistant hard coating for increased protection and durability Last around twice as long as standard outside cover lenses Replace once a week depending on use Reviews (No reviews yet) Write a Review