Camera Accessories
4.7 Inch Suction Cup Camera Mount, Air Pump Vacuum Suction Mount with 1/4 and 3/8 Screw Holes, 360° Rotation Car Suction Cup Bracket for Sports Cameras, DSLR Cameras
Multiple Hole Design: Featuring several 1/4 inch threaded holes, the suction cup camera mount offers powerful functionality. The middle part has a 3/8 inch threaded hole and a for positioning hole, effectively preventing rotation and detachment....
https://www.bizrate.co.uk/cameraaccessories/4-7-inch-suction-cup-camera-oid30196444614.html