I live in California, a medical cannabis state. Dispensaries are starting to carry pre-filled CO2 cartridges ranging from supercritical extraction to carts with PG and other additives. Some companies offering these are Absolute Xtracts, Pure GOLD, MedWest/BHANG. I've been sticking with the pure cannabis carts. I've been told by a dispensary that these carts are reusable. I've purchased several over the last several months and they all seem to use the same wick type cartridge. They work pretty well with consistent draws and no leaking. The pic below shows some black at the thread but its actually a shadow. Just wondering if anyone knows who makes these cartridges, how they work and whether they should be avoided for reuse with CO2 oil for any reason?