The fastest and easiest way to mount a device holder to your windshield. The large 3.4" suction cup surface area gives a great foundation for mounting your devices. The integrated 20mm mounting ball allows you to easily attach our mounting arms and device holders while giving you the freedom to position everything exactly where you want. **PATENT PENDING** Select one of our pre-built configurations from the dropdown menu which includes a 7cm arm and a device holder. We recommend pairing this suction cup with either a 4cm or 7cm arm and one of our device holders: Universal Phone Holder XL Universal Phone Holder DiabloM6 Magnetic Phone Holder MagSafe-compatible Magnetic Phone Holder MagSafe-compatible Wireless Phone Charger Wireless Charger with Motorized Cradle See all of our device holders. Note: 10cm, 13cm and 20cm mounting arms are not recommended.