I hope the photos included come out okay, it's a tiny camera and getting close-ups is hard. pic 1 - Monojects have a 12.7mm needle length compared to most new syringes that have gone from 8mm to 6mm. It's a nightmare getting a 6mm needle into a long haired cat. pic 2 - Look how much thicker the plungers are on Monojects. It's awful having a squirming cat and getting the plunger 1/2 way down before it binds on you. pic 3 - The plunger caps (for lack of a better word) are twice the size on Monojects. You'll get a way better feel for how far the plunger has gone down especially if you often have to work in low light because of migraines. pic 4 - The plunger tabs on Monojects are made of a softer plastic and are much bigger than on BD's. Again, this is just something you feel and I cannot put into numbers. If anyone can't find these it might be because Monoject partnered up with Coviden. The 29gauge 1/2cc 12.7mm needle are product code 8881600848 If you're really lucky you might find 30 gauge 1/3cc syringes. I know people get set in their ways but I'll never go back. I've had to use BD's for 2 weeks and Noah got his first fur shot in years. Do not let the needle length put you off, it's easy to deal with if you're a tent injector.