Perch mount. ECE approved. Die-cast construction with an adjustable stainless steel ball socket construction, allowing left/right side installation. Clear convex glass to widen your field of view for added safety. Installs to the stock mirror perch (mirror mounting hole) with the included 5/16-18 x 1.5" allen bolt. Allows regular or upside down installation.
Dimensions approximate 3.75: (95mm) head diameter.