If you have any doubts, you can consult the seller in advance, we will reply you in 24 hours. 1. Easy installation: 1 inch ball mount base threaded rearview mirror is easy to install, easy to disassemble, and can be installed directly, saving time and effort.Compatible with RAM Mounts B Size Double Socket Arm 2. High-quality material: Made of high-quality Stainless steel and TPU, it is non-slip, water-resistant, and does not rust. 3.CNC MOULDING: CNC precision engraving, precise size, smooth surface, no scratching. 4. Non-slip and durable: The diameter of ram 1 inch ball mount, and the surface is covered with non-slip rubber, which is non-slip and durable.5. Wide range of applications: suitable for motorcycles, electric vehicles, and ATVs with a diameter of 1/4-20 on the rear-view mirror compatible with ram mount dual ball socket arms.