Zilco's "Gold" range of bits contain a special mix of copper (85%) and quality metals which produce a bit with superior strength. Guaranteed nickel free, reducing the risk of nickel allergies. The horse is encouraged to salivate through the copper content. This model can be used with a fixed cheek weymouth bit or on its own as a snaffle. Mouth 13mm, Ring size 50mm Size: 10cm, 11.5cm, 12.5cm, 14cm