Ring diameter: 6.5 cm. Caliber: 14mm. The SENSOGAN material results from an optimal combination of Copper, Manganese and Zinc. The combination of Manganese with a low copper content makes this material much softer and with a much more reduced and compensated oxidation process. Manganese is an important micronutrient for the development of metabolism and the reduction of stress. The low copper content reduces the appearance of stains. * Toxicologically tested. * High tolerance. * Easy to clean. * Facilitates the constant flow of saliva. In the Sprenger catalogue, quality codes 78 (golden mouthpiece with stainless rings), and 79 (golden mouthpiece and rings). Dynamic RS * Ergonomic shape. * No pressure on the palate. The pressure is distributed throughout the mouth. * Gentle on the mouth and tongue. * The embouchure joint is twisted up to 45 degrees. * Curved joints keep the snaffle in the correct position in the center of the mouth.