and high quality. Ball adapter This 25mm to 25mm/17mm/15mm dual ball mount arm is made of sturdy composite material and compatible with all industry standard 25mm mounting arms. Ball joints are coated with rubber material. The dual ball design allows for flexible adjustment and enables 360-degree rotation of your device. Features a 25mm mounting pattern suitable for GPS, phone holders, or other devices with a 25mm base. Specifications: Item Type: Ball for Head Mount Material: Rubber + Metal Size: As shown in the picture Color: Black Quantity: 1 Piece Package Includes: 1 x Ball for Head Note: Please allow 1-3mm variation due to manual measurement. Due to differences in displays and lighting, the actual color of the item may vary slightly from the picture. Thank you for your understanding.