Features: The retractable suction cup base ensures rock solid stability for devices during drives, featuring a 17mm ball head that securely fits most car phone mounts and accessories. Engineered with a flexible 17mm joint and reinforced plastic construction, this suction cup base adapts to curved dashboards while maintaining vibrations resistant grip. Perfect for daily commuters, rideshare driver, and adventure travelers needing reliabled device mounting across multiple vehicles and road conditions. Maintains firm adhesion during sudden stops on highways, bumpy terrain off road, or tight parking maneuvers. Its suction mechanism combines space efficiency with industrial grade hold strength, designed for year round temperature changes and repeated repositioning without residues. Specifications: Component: Plastic Size: Applicable to 17mm ball head equipment Product size: 15.5x6.3x5.6cm Product ball head size: 17mm Package Includes: 1pcs Suction Cup Base 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.