Features: Enhances your car phone holder with this 17mm ball extension poles adapter featuring never blocking vent design and full 360 degree rotation for optimally viewing angle. The adjustable elbow joint with secure 17mm locking mechanism provides flexible positioning in tight space while maintaining connection to car air vent phone holders. Ideal for driver, commuters, and DIYer enthusiasts needing reliable phone positioning without obstructing dashboards controls or airflows vents. Perfect for ride sharing services, and daily commutes where quick accesses to navigation apps and secure device mounting is essential. Its universal 1/4" threading and aluminum alloy extension rod enable seamlessly integration with most car phone stands and aftermarket accessories. Specifications: Component:aluminium alloy Size: Approx.10.6cm/4.17inch Size: Approx.12cm/4.72inch Color:Black Package Includes: 1 Set 17mm Ball Extension Poles Adapter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.