Features: Application: Fits dual socket arm cell phone mounts and other cell phone mounts with 1 inch ball socket design and can be installed on motorcycles mountain bikes electric scooters and more. Material: Made of stainless steel material for durability and reliability in the most demanding environments weatherproof durable and practical. Practical: The ball mount base can be used with other accessories of the motorcycle mount to fix the cell phone and navigation device during driving and action camera to record travel. Stable Fixed: The ball head adpter is anti skid and shock proof with rough particles effectively increase contact area not afraid of shaking. Installation: Screw adopts thread design and can be directly installed on the original rearview mirror of the car or where there is a screw hole which is convenient and quick to install. Specification: Material:Rubber + stainless steel Screw Thread Size:M8:0.8*1.2cm M10:1.1*1cm includes: 1*Rear-View Mirror Mount Ball "