3ml Disposable Plastic Syringe Cartridge for Precise Weight Loss Injection Pen

We've been shipping these for years now, mostly into clinical research and compounding pharmacies, and what it does is replace those bulky multidose vials with something far more for the user. Basically, it’s a pre-filled syringe cartridge that clicks into a compatible injection pen, designed so patients don't have to draw up their own doses from a bottle. One detail we learned the hard way is that the blue-tinted cartridge shells reduce light exposure better than the grey ones if someone's leaving the pen assembled for a week or two.

The big one right now is GLP-1 compounds for weight management, but we also see these going for insulin pens in some European markets and for growth hormone cycles where tritration matters. Important to note—this isn't suited for anything needing more than a 0.6ml single jab, so if your protocol demands a full 1ml or 2ml per dose, you'll want a different delivrey system. 0.01ml minimum dose lets you dial in those tiny starting amounts when you're ramping up a patient slowly, which for some compounds is critical for avoiding side effects.

Inner diameter sits at 9.7mm, and the pen barrel itself is 17mm across, so it fits most standard pen bodies we've tested at this price point. Injection completes in six seconds flat or less—that's with a 31G or 32G needle, and the mechanism gives a small click that tells you it’s done. Keep in mind the needle isn't included in the cartridge, so you'll need to pair it seprately. TDS and COA documents come with every batch we ship, and we've got the CDE packaging record completed if that's a regulatory requirement on your end.

What you're getting here is a certified Class II medical device from a regional manufacutrer we've audited personally, with custom label printing available if your brand needs control over the marking. People ask about price first, but actually the real advantage is the documentation—most alternatives from overseas lack CDE stuff, which can stall a submission. We usually have stock on the grey bodies, about 2000 units or so, but blue might need a lead time quote depending on volume.

50 units or more gets you a better per-unit price, but honestly we see most buyers go in for 200 to start, just to run a small validation batch before scaling. One thing nobody thinks to ask: the Luer lock on these is slightly tighter than some generics, so make sure your needle hubs aren't looser than the ISO standard—we've had one batch of off-spec needles that required a bit more force to seat properly. 9.7mm inner diameter means lower plunger friction too, which is better tolerance than you'd get from a random polypropylene shell.