Magnetic Power Plate III The RAP-300-1, RAM Magnetic Power Plate III, is designed to hold various devices including radar detectors and cellphones. The magnetic plate includes two powerful rare earth magnets, rubber holder and two adhesive metal plates. To mount your device to the magnet, you will need to attach one of the metal plates to the back of you device. Includes a rectangular 50mm x 38mm x 0.08mm thick metal plate with adhesive back. The fixing hole pattern on the back is the four hole AMPS variety. Compatible base E.g. RAM-B-202 Material: High Strength Composite Colour: Black Dimensions 80mm x 100m