Features: Crafted from natural wood, advanced traditional Chinese machining technique, wood rings are great for Traditional Chinese martial art training. Carefully sanded and polished several time, precisely baked and shaped for smooth surfaces and comfortable feel during training. Elevating your Wing Chun skills with these Wood Rings. Great for professional, beginner, and Traditional Chinese martial art, Traditional Chinese Wing Chun enthusiasts. Training makes the arm hand strong, while the flexibility of the shoulder, elbows and wrists is also trained and improved. 4 different inner diameter: 175mm, 220mm, 280mm, 350mm. Choose as your training need. Light in weight and easy to carry. Could be easily put in bags or backpacks, very convenient to take it any where. Specifications: Color: Wood Color Component: Wood Size 1: Approx. 175mm/6.89in Size 2: Approx. 220mm/8.66in Size 3: Approx. 280mm/11.02in Size 4: Approx. 350mm/13.78in Weight: Approx. 130-280g Package Includes: 1Piece Wood Rings note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color