Features: Specially designed for OSMO Mobile 3 and OM 4. Enables you to add phone for case and lens setup on smartphone when use OSMO Mobile 3/ OM 4 gimbal. This would also be excellent when using superwide on i-phone 11 pro as you can see the motor in the balanced normal position I had to set the zoom at 0.9 Coming for w/ 3 weights. The counterweight supports the external equipment that can be balanced, such as wide-angle lens, telephoto lens, etc. and weighs less than 70g. If there are questions,please contact us. Specifications: Material: Stainless steel 10g weight size: 13x14mm/0.51x0.55in 20g weight size: 23x14mm/0.91x0.55in Applicable objects: OM4/OSMO Mobile 3 Color: silver Note: Note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 3 Pcs Counterweight Balance Counters.