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 in rubber. The dual ball design allows for flexible adjustment and 360-degree rotation of your device. Fits 25mm mounting pattern for GPS, phone holders, or other 25mm base accessories. 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 difference due to manual measurement. Due to different display settings and lighting, the image may not reflect the actual color of the item. Thank you for your understanding.