Professional’s Choice Bit - Long Double Bar Chain PCB-903Cheek: 8 Mouth: 5. 5 The chain mouthpiece is mild yet more aggressive than a two or three piece snaffle mouthpiece. All mouthpieces are sweet iron, this creates a sweet taste in the horses mouth and promotes salivation. The 8" Stainless steel Cheek provides great balance, smooth leverage application, and quick release. These bits will rust when exposed to moisture.