1. Material: This golf putter weight is made of high-quality tungsten steel, featuring rust and wear resistance. 2. Compatibility: It can be custom - replaced with putter weights of 25 grams, 30 grams, and 35 grams, but it is not suitable for putters with square club heads or roundabout - style designs. 3. Protection Design: The weight is equipped with a protective rubber sealing ring (O - ring) to prevent moisture from entering the weight cavity of the putter. 4. Marking: The center area of the weight is marked with the weight in grams. 5. Specification Parameters: - Material: Tungsten steel - Diameter: Approximately 2 cm / 0.78 inches - Thickness: Approximately 6 mm - Weight: Available in 25 grams, 30 grams, and 35 grams - Color: Available in red, blue, and black 6. Package Contents: Includes 1 golf putter weight. 7. Notes: Due to differences in display settings and lighting effects, the actual color of the product may slightly differ from the color shown in the pictures. Thank you for your understanding.