Herm Sprenger KK Weymouth Dressage Bit has an anatomically shaped mouthpiece with a center port angled forward 45 degree so that the bit not only fits comfortably in the mouth but also avoids contact with the sensitive palate when they reins are pulled. Herm Sprenger from Germany is renowned for its outstanding quality and technologically advanced designs. The SPRENGER seal of quality guarantees safety and precision workmanship for over 135 years! Herm Sprenger bits are available in different metals and offer two metals made specifically for use in horse bits - Aurigan and Sensogan. Aurigan: Special nickel-free alloy which, due to the inclusion of silicon, combines the pleasant tasting oxidation advantages of pure copper with maximum strength A perfect mixture of materials: 85% copper, 4% silicon, 11% zinc which encourages salivation and intensive chewing activity USDF and FEI approved metal Sensogan: An alloy of Copper, Manganese and Zinc that is an improvement on Aurigan Reduced copper content and the addition of Manganese helps to regulate the oxidation process May be a better choice for horses who salivate too much with a copper bit Will keep its white gold color longer The Herm Sprenger KK Weymouth Dressage Bit has a slight port that is angled forward 45 degrees which allows for more palate clearance. Available in Aurigan with Aurigan cheeks, Aurigan with Stainless Steel Cheeks, Sensogan with Aurigan Cheeks, Sensogan with Stainless Steel Cheeks Suitable for introducing a horse to a Weymouth Bit For horses with a sensitive mouth Not sizes and thicknesses are available in each metal Thickness: 18 mm or 21 mm Lower Cheek Size: 7 cm = 2.8" Curb chain included