APG6018 1. Inner diameter: 90mm. 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. 6. It resists high temperatures 80℃, and resists low temperatures -40℃. 7. Steel balls: 100% ------------------------------------------------------------------------------------------------------ US patent No: US D588, 392 S PCT/CN2008/000536 -------------------------------------------------------------------------------------------------------------- Main features: 1. Provide the most portable installation fittings for your GPS system. Turn your windshield mounted GPS device into a dash mounted GPS devices. no blind area, keep your driving safe and convenience, 2. The endergonic holder used the technology of energy absorb and power balance calculate, instantaneous vacuum suction and high skid proof coefficient. It makes up of a safety guarantee system of aseismatic, skidproof and steady. This technology is the first invented by us in the world. 3. By the dynamic test, when the car sudden brake and swerve in high speed; bump in a mountainous area; impinge lightly; it also can keep my product not move. It keep the safety and steady for the electronic product. 4. The endergonic holder can endure the high temperature of 80 centigrade, the low temperature of–40 centigrade, suit for using whole day. 5. With no fastening and no tools installation, the endergonic holder can be moved from vehicle to vehicle easily meanwhile keeps your GPS in close view. Can easily be moved from vehicle to vehicle or put out of sight when leaving the vehicle. 6. Works with most kinds of windshield mount, 7. Weighted with anti-skid silicon base 8. Conforms to different dashboard 9. Portable and stowable, keep out of view-anti theft 10. Available in various beautiful blister and color box retail packing