This French link has small rings for horses and ponies with small faces. The fixed rings also prevent pinching. Mouthpiece thickness: 14mm. Cheek height: 50mm. This French link has small rings for small-faced horses and ponies. The fastened rings also keep fingers from being pinched. The thickness of the mouthpiece is 14mm. 50mm is the height of the cheeks. The most frequent material for bits is stainless steel. It is long-lasting, easy to clean, odourless, and does not rust. Stainless Steel