Sprenger Sensogan Novocontact Single Jointed Pelham Bit Bit Size:5" 125mm the MB04 mouthpiece will first the MB04 mouthpiece will first collapse to wrap the outer lips & bars The curved stainless steel mouthpiece featuring copper inlays is designed so as not to pinch the lips or bars The main difference offered by Sensogan is due to the unique combination of copper and manganese which results in a smoother and far more regulated oxidative process which has proven very appealing to the horse in field tests this micro nutrient is extremely popular in the feeding regime of sports horses as tests have concluded that manganese aids in muscle and energy metabolism