Carole if you are thinkin of switching to the U100 syringes i highly recommend it. It is nice to get a precise small dose! Send me a PM if you'd like to try some before you buy a box. I got a box of 100 from walmart for $13 around 2 weeks ago, i have 80 or 90 left and can send you a bag of 10 to try if you want, its unopened. Hopefully I wont be needing them (anti-jinx!!) I plan on keeping a bag of them in case, but will put the rest on the supply closet in a few weeks, along with about 60 or 70 U40 syringes that I know i won't be needing.