I had messed up big time. I recently upgraded to a cart farmer gun and got one of thoe Vapebits and the bit vise to make for quicker filling and easier screwing on of the mouthpieces. I have been making carts for a few years and have been going through cartridge supply co. I found these for cheaper and decided to give them a try. Some how I had missed the instructions. You have to cap the cart right away and turn them upside down. I did not know that and had over 200 of them leak out the bottom and get clogged up. With other carts the bottom rubber piece has a little post in it that goes into the bottom hole on the cart similar to the rubber on the mouthpiece. I usually fill all 100 in a flat then put them in the vice that tightens the styrafoam so they can't spin then use the vape bit in a screw gun and it screws the caps on fairly nicely. With these carts you need to put the cap on immediately. I lost a good amount of rosin and even more time. What a mess. I emailed the company asking what I did wrong thinking they were faulty carts but I was operator error on my part. Quick customer service. Good company!!!

Great hardware, even better price. No issues with the 100 I got sent. Super fast shipping too.

PERFECT! Glass tubes, quality atomizer, SAFE DELIVERY, Never had broken shipment.
Do be CAREFUL not to over tighten. I had 1 out of 300 mouth pieces detach from the metal fastening bracket. That was on me, but worth mentioning.

Bought a couple hundred of these to throw some oil in and not one issue… they filled, work, and pull fantastic. Will definitely be purchasing from in the future

Very happy with the product and I had them within a week I will definitly be ordering again soon.