inno sense eggbutt port medium 15 whiteThe side piece is a standard bit. The rings cannot move freely, so the aid comes through more directly and the bit lies relatively steady in the mouth. The bit also prevents the lips from being pinched, which makes bit guards unnecessary with this cheek piece. The Inno Sense with medium port is made of elastic synthetic material and is slightly harder than the Inno Sense Flexi Soft. The port provides more tongue freedom so that no pressure is exerted