Pack of ten high-heat outside protection lenses (part number 427071) to suit the 3M™ Speedglas™ 9000 and 9002 series helmets. High heat resistant lenses are designed for high heat applications. These outside cover lenses are rated to 205 degrees compared to 140 degrees for the standard Speedglas™ 9000 outer lenses. Look to replace high heat cover lenses once a fortnight. Cover lenses suitable for the new Speedglas 9002NC. Comes stanrd in a pack of 10 (plate marking 420171). Scratch-resistant cover plates also available (part number 427070). Outer lens dimensions 159 x 96mm.