Description: brand new and high quality. Feature: Made of high-quality material, portable and durable for us to use. High precision laser engraving. Easy and convenient to install and remove. An intimate photography assistant, help you to capture all the beautiful images and -shoot stably as ever. It is an adapter that is used to convert for Osmo-Mobile 3 or 4 OM4 for - Hero 9. This OM3 or 4 adapter is molded with 3D printing technology and is made of plastic. - Hero 9 Black is dedicated and not for other cameras. Contains counterweight iron blocks, after the counterweight is balanced, it can reduce the pressure on the motor, make the shooting picture smoother, and reduce the motor heating. Adapter Set only, other accessories demo in the picture is not included! Specifications: Item Type: Adapter Mount Plate Material: Plastic Color: Black Quantity: 1 Set Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls 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: 1 Set x Adapter