Myler Western Dee Comfort Snaffle with Copper Roller MB 03Myler Stainless Steel Western Dee, MB 03 Comfort Snaffle with Copper Roller, Level 1 The MB 03 is the Myler alternative to the traditional French link or lozenge mouthpiece commonly used in snaffle bits with an added copper roller. The MB 03 rotates onto the tongue, applying tongue pressure, but because the mouthpiece is curved, it wraps around the bars and lips instead of pinching. The barrel in the center applies approximately the same pressure on