Myler SS 7 Flat Shank Comfort Snaffle Wide Stainless Steel 7" Flat Shank with Sweet Iron Comfort Snaffle Wide Barrel (MB 02, Level 1) Copper Inlay Mouth 4 3/4". This mouthpiece is made of polished Sweet Iron which naturally oxidizes or rusts. Harmless to horses, it has a sweet taste and promotes salivation. Features: 7" Flat Shank Wide Barrel Copper Inlay Mouth 4 3/4" Polished sweet iron Promotes salivation