Features: Car suction cup base with for 3M adhesive tape. With 1 inch rubber ball mount. 90mm suction cup in diameter. Made of high-quality material, durable, firm and stable for us to use. With a small shape and compact size, it is easy and convenient for us to take and carry. Fully compatible for mounts, to work for dvr, gps and smartphones.Rubber Ball Mount Base only, other accessories demo in the picture is not included! Specifications: Item Type: Rubber Ball Mount Base Material: Plastic+Rubber Diameter: 90mm/3.5in Ball Diameter: 25mm/0.9in Height: 40mm/1.5in Color: Black Quantity: 1 Pc Package Includes: 1 x Rubber Ball Mount Base note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!