http://www.bhphotovideo.com/bnh/con...s&Q=&sku=259157&is=REG&addedTroughType=search I just want to say, this is probably the best 16 dollars I have spent on camera gear to date. First off, when they say large, they mean large. Also, this thing BLOWS, and I mean that in a very good way. It completely cleaned my sensor off with just a few puffs. I'm including some pics of before and after for my sensor to show how well this thing worked, and I'll add some pictures of the rocket itself for comparison in size. (before and afters are 1024x768 because I felt it needed to be as large as possible to show the effect, sorry dial-upers) Before: Notice the dust, mostly on the top half of the picture. There are 2 very noticable spots. F/32 for both pictures After: 5 or so puffs of air with the mirror locked up in sensor cleaning mode Just to show you how large the Large Blower is: and I want to say, I have never cleaned a sensor before so it's not like I have any skills or special abilities, its just really that easy. I have also used this blower to clean out the dust from my keyboard, parts of my computer (mainly the fans) as well as any specs on the viewfinder and on lenses themselves (so I dont have to touch them). In the 3 days that I have had this it has more than paid for itself. Got mine from B&H (was 16 something shipped to my door). ordered it tuesday night, they said it shipped on thursday (I blame the long processing to the fact that they were closed for 10 days and probably had LOADS of orders to process) and I had it friday. I live in Maryland, so it isn't that far away, but I always get packages in 1 day from B&H using UPS 3-5 day shipping.