LOOK NO FURTHER! The SensorSweep is the absolute best sensor brush on the market today. It accepts a charge better than any other brush, and, on top of that, it holds the charge longer than any other brush. What all of this means to you is that, with a moderate amount of practice, and depending on your mechanical abilities, you may be able to charge this brush ONE TIME and greet your sensor with a double-sweep, just like the double-swipe of a SensorSwipe. Charge it once, a double-sweep and you're done! There still exists a lot of confusion about what type of brush makes a good sensor brush; many people are getting mediocre and inconsistent results with both, the store-bought brushes and the exhorbitant brushes. We are giving D-SLR users an option that can be trusted to be CONSISTENT, from the construction and quality of the brushes, to the proprietary charging of them, to the actual prescribed method. This brush will take all of the guesswork out of this job for you; you won't have to worry whether or not you have the right brush and the correct method. NOTE: The SensorSweep is the ONLY static brush sold whose synthetic filaments are made in India rather than China or Germany. What this means is that our bristles will not splay outward with continued use, they will maintain their shape indefinitely. As Thom Hogan points out, this is critical because when the cheap, white nylon bristles go sideways, they have a tendancy to pick up lubricant from the area surrounding the sensor and deposit it where you don't want it. READY TO USE! For your convenience, the SensorSweep has been pre-washed and rinsed with distilled water, and then sanitized even further to remove oils, grease, glue and other heavy particulates that the manufacturing process has introduced. The only thing you'll need to do is to blow off the tips of the filaments and you're good to go. You can use practically any type of blower to charge the SensorSweep, as well as the charging medium that is supplied with the brush. You'll also get a carrying/storage tube that can be tossed into your camera bag.                                  Brush-on-the-Fly - SensorSweep plus Rocket blower     ONE SIZE FITS ALL: The SensorSweep's tip is ½" wide; it will work on every D-SLR. And with some practice, you'll handle a full frame sensor with one double-sweep.   We are incredibly confident this is the best performing sensor brush on the market at a more than affordable price! Please read what others had to say: http://www.associatedcontent.com/article/887543/product_review_copper_hill_images_wetdry.html?cat=15 http://www.dpreview.com/forums/read.asp?forum=1032&message=22493365  http://www.aguntherphotography.com/reviews/copperhill_sensor_brush.html http://www.fencecheck.com/forums/index.php/topic,6289.0.html