Myler Stainless Steel 6 3/4" MBL Medium Shank, MB 43MP Narrow Medium Ported Barrel, Level 2-3 The MB 43MP does not rotate on to the tongue, but instead sits solidly across the bars and lips of the horse’s mouth. The port is narrower than a Level 3 mouthpiece, but still offers room for the horse’s tongue to pass under the bit. Because the port is narrow, when the reins are engaged, the horse will feel a slight pressure on the outside edges of the tongue — a gentle reminder rather than a strong reprimand. The port on this mouthpiece is only 1 ½" high, so it will apply little to no palate pressure. The MB 43MP is the mildest of the Level Two-Three mouthpieces in terms of tongue pressure, just one step below a Level 3 mouthpiece. Sweet Iron mouthpiece oxidizes and encourages salivation.

Notes: For more tongue pressure, see the MB 27LP. For more tongue relief, see the MB 41PB. For slightly less tongue relief or a lower port, see the 43LP. For the same benefits but with some palate pressure, see the MB 43HP. For the correctional version of this mouthpiece, see the MB 47 and MB 47PB. For the Level 3 version of this mouthpiece without Independent Side Movement, see the MB 12 or MB 98.
The MBL Shank is a length of flat stainless steel curved slightly back towards the horse, with a teardrop purchase and a rein ring. The mouthpiece attaches loosely to the cheek with a small decorative stack that allows ⅛" of slide, just enough to allow more tongue relief. The purchase is angled slightly away from the cheek to avoid rubbing. The MBT has the patented Independent Swivel Cheek, where the purchase, mouthpiece and shank all move independently of each other.
The MBL is an indirect (curb) rein action designed to be used with a curb strap which attaches to the purchase. The MBL uses the combination of fixed cheek and fixed rein to apply pressure to the mouth, chin and poll. Recommended for use with ported mouthpieces.