Trusted by nasa for use on the international space station the new sensorklear loupe kit contains everything you need to keep your own dslr camera sensor free from dust and your images spotless 1 sensorklear loupe to detect dust on the sensor surface 2 lenspen hurricane blower to remove dry dust 3 sensorklear ii pen to remove those dreaded particles of sticky dust and remember only the unique design of sensorklear loupe and sensorklear ii allows you to see and clean at the same time