Review on 📷 ULANZI PT-10 OM 4/OSMO Mobile 3 Gimbal Stabilizer Counterweight Balance Counter Weights – Supports 60g, Compatible with DJI OSMO Mobile 3/4 and Moment 1.33X Anamorphic Lens for iPhone 11/Pro/Pro Max by Cory Mosley

There is currently only one counterbalance on the market that fits the Osmo Mobile 3. I've visited several stores (Lowe's & Home Depot) to buy some bolts and use M3 screws to attach to other counterweights (Moment, Eachshot, etc.) and NONE has been as good as this one. The threads on this are not (yet) stiff or rusting. I can use all my Moment lenses with my iPhone XR without any problems. The case is a little thick so the Osmo Mobile 3 doesn't hold the phone tight enough, but when new cases come out I might actually be able to use 67mm filters with lenses (currently I can't). I should also note that the newer iPhones don't seem to need a gimbal as they have pretty good camera stabilization. All in all, these are the best counterweights you can get for the Osmo Mobile 3.