Stainless Steel 3-Ring Combination Bit - 6" Shank with Sweet Iron Comfort Snaffle (MB 01, Level 1) Copper Inlay. This mouthpiece is made of polished Sweet Iron which naturally oxidizes or rusts. Harmless to horses, it has a sweet taste and promotes salivation. Now comes with black leather noseband and synthetic black curb strap (not as pictured).