4 Camera Lens Air Dust Blower Cleaner for Canon SLR. This is a new set of 4 dust blowers. Great for removing crystals from watches. Insert nozzle inside any watch stem hole and squeeze the bulb and it will blow out the crystal without damaging it . Just squeeze for a blast of air. You receive: One dust blower that measures approximately 5 1/2" (140 mm) long 3 Dust blowers that each measure approximately 4 1/2" (114 mm) long. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.