1. Features: - Specifically designed for heavy - duty telephoto lenses. Widely used for shooting wild animals, rare birds, sports competitions, and wonderful moments, etc. - By loosening the sliding lock knob counter - clockwise, the base can rotate 360 degrees. Therefore, you can rotate around the center of gravity of the lens and easily handle large - sized lenses. - By adjusting the vertical balance adjustment knob, the weight on the quick - release plate can be adjusted up and down. - The 1/4 - inch screw holes on the quick - release plate are compatible with most cameras. The 3/8 - inch thread at the bottom of the ball head can be used to install various tripods. - The outside is largely covered with foam, which is anti - slip and warm, providing a more comfortable grip. - It rotates smoothly and is easy to operate, making it an excellent accessory for outdoor photography. 2. Specifications: - Condition: 100% brand new. - Material: Alloy + foam. - Color: Black. - Top screw: 1/4 inch. - Bottom thread: 3/8 inch. - Dimensions: Approximately 22 * 7.5 * 21 cm / 8.7 * 2.9 * 8.3 inches. - Weight: Approximately 1313 grams. 3. Package List: - 1 * Universal joint tripod ball head seat. - 1 * Quick - release plate. - 1 * Screw. - The universal joint and the camera are not included. 4. Package List: - Specifically designed for heavy - duty telephoto lenses. Widely used for shooting wild animals, rare birds, and wonderful moments in sports competitions, etc. - By loosening the sliding lock knob counter - clockwise, the main seat can rotate 360 degrees. Therefore, you can rotate the lens around its center of gravity and easily control large - sized lenses. - By adjusting the vertical balance adjustment knob, the balance on the quick - release plate can be adjusted up and down. - It rotates smoothly and is easy to operate, making it an excellent accessory for outdoor photography.