... /CN2008/000536,China:200720046003.4,200730030922.8Specificaitons1.Inner diameter:85mm.2.Outer diameter:165mm.3.Material:spandex, ABS plate, steel ... balls, silicon.4.It suits 4.3",3.5",2.8",cell phone,GPS's combined using.5. Pull of displacement 60N ... resists low temperatures -40celsius degree.7. Steel balls:100% Universal GPS cushion/Car Holder for iPhone/Car Holder for iPhone Universal Device Holder