Anti-slip and shockproof: TPU overmolded M10 ball adopts ergonomic design, perfectly fits the double socket arm, the connection is tight and not easy to loosen, the ball base is soft and elastic, which effectively alleviates the huge impact of the mobile phone holder when riding, even at high speed on potholes, the ball connection part can rotate 360, and the mobile phone holder can be freely adjusted horizontally or vertically, enjoying super stable and perfect riding vision. Compatible with RAM bracket: 1-inch ball adapter with M10x1.25 studs for RAM mounting B-size double socket arm and motorcycle mobile phone holder, supports connecting any mobile phone mounting accessories with 1-inch ball mounting pattern, 1-inch ball base is suitable for M10x1.25 diameter motorcycle rearview mirrors, electric vehicles, ATVs and other devices with a pitch of 1. Installation size: M10x1.25 ball consists of -type 1-inch TPU ball and an M10x1.25 threaded post, the ball diameter is 25mm, the M10x1.25 external threaded steel post can be connected to any standard female thread on digital cameras, camcorders and other devices, the threaded hole must include the following dimensions to install this motorcycle phone M10x1.25 spacing. Colour:Black Material:Stainless steel Package Contents: 2 x ball Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.