Features: Car Vent Phone Mount Base with 13mm/15mm Ball Head ensures secure attachment and 360 degree rotation, fitting most magnetic phone holders and vent types without blocking airflows. Choose between 13mm or 15mm ball heads (for most holders excluding 17mm) and adjustable hooks for versatile compatibility with horizontal, vertical, circular, or angled vents. Designed for driver, commuters, and travelers seeking a solution to stabilize phones or tablets during navigation or calls. Effortlessly mounts onto car vents during daily commutes, road trips, or rideshare services while maintaining device accessibility and dashboard aesthetics. Plastic construction make this vent clip base a accessory for magnetic phone holders, tablet mounts, or devices in any vehicle. Specifications: Component: plastic + metal Ball Head Diameter: 13mm/15mm Color: Black Package Includes: 1pc Car Phone Holder Base note: ONLY include a base, NOT include phone holder. Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.