Sprenger HS Rubber Mullen Mouth Bit With 20mm Straight Flexible Mouthpiece Bridle Accessories Easy slip on quarter zip design color_69044 black Easy slip on quarter zip design making it particularly suitable for riders spending a lot of time in the saddle Due to the soft material properties of rubber no returns or exchanges are possible if there are chew marks on the mouthpiece Rubber Mullen Mouth bit 20 mm thickness straight and flexible mouthpiecemade of soft but durable rubber that has a stainless steel cable inside to reinforce the mouthpieceexerts steady and even pressure onto the whole tongue widthCompared to metal bits rubber bits are softer and should not get in contact with the teeth of your horse