Features: Premium 17mm aluminum alloy ball head base securely holds smartphones, tablets, and accessories with adjustable angles for optimal viewing in vehicle. Features 360 degree rotation and telescopic design for effortless height/angles adjustments, fit all 17mm ball head mounts like magnetic car holders and tablet clamps. Ideal for driver needing navigation support, multitaskers following recipes, and professional seeking stable device positioning. Perfectly adapts to car dashboards, and trucks – delivering convenience during commutes or video calls. Engineered with aluminum construction, this mounting base ensures vibrations resistant stability for mobile devices across multiple environments. Specifications: Component: Aluminum alloy Bottom size: about. 9.8x6.3cm/3.86x2.48in Ball head diameter: approximately 17mm Package Includes: 1pc Mount Base note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.