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We’ve been sourcing these HL006 pens for about eight months now, and they’re basically our go-to for the retatrutide work. The 3ml cartridge handles the standerd 0.6ml max dose per shot, with the 0.01ml minimum increment—tight enough for most titration protocols. It’s mechanicla, so no batteries to fuss with, and the 31G or 32G needle options are fine for subcutaneous delivery.
Our lab uses them for the GLP-1 analog studies, but we’ve also had a few buyers from the nutraceutical side running smaller batches. The adjustable dose and the 6-second injection time mean you can dial in a consistent 0.1ml or 0.3ml without much trial and error. It’s not suited for anything requiring a fixed, non-adjustable dose—those screw-type pens are better for that.
The visual and auditory feedback after each injection is a nice touch; you get a click and a visible plunger position so there’s no guessing if the full dose went in. One thing we didn’t think to ask upfront was the cartridge inner diameter—it’s φ9.7mm, which is pretty standard for 3ml cartridges, but it’s worth checking your own glassware before ordering.
Most buyers we deal with go with the blue/grey color and the printed label option, though we’ve done plain grey for a few who wanted less branding. The MOQ is typically 100 units or so, but we usually have stock for smaller runs—confirm lead time if you’re under that. Also, pen dimnesions are listed as 17.2mm, but that’s the length, not the diameter—it’s about as thick as a standard marker.
Supply chain’s been stable out of China, but we’ve seen some variation in the press cap fit over different batches. It’s a Class II medical device, so the COAs are solid, but we always run an HPLC check on the first 20 units from a new lot. Not a dealbreaker, just something you’ll want to verify if you’re using it for research-grade matrial.
