I purchased three more of the Wulf Duo magnetic rings to attach to multiple cartridges, as I use different cartridges for different times of the day (some to get to sleep, some to get my brain functioning in the morning along with coffee, haha). This has been such a convenient game changer for me, and for this price point and the the simple, yet quality piece of mechanical functionality, it's a no brainer that having a few extra of these in your possession is a good move. I actually plan on ordering more, and only stopped in to leave a review because I was checking to see if they were back in stock yet!
WARNING: This product can expose you to chemicals including nicotine, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov
