- Type: RA burs. - Model: RA3. - Fit for Low-speed contra angle handpiece. - Shank type: RA (22 mm). - Shank diameter: 2.35 mm. - Overall length: 22 mm. - Shape: Round. - Head length: 1.1 mm. - Head diameter: 1.2 mm. **For further product information, please contact Chat Support**