Reinsman Western D-ring snaffle. 3/8" smooth copper mouthpiece with 3" rings and a 5" mouth. 
 
"The Dee ring applies pressure to the horse's cheek on the opposite side of the face from the rein you pull to allow better flexion. The 3/8" is a perfect all around mouth. Golden Glide bushings eliminate pinching for smooth movement. Mullen relief mouth for even pressure across the bars and toungue. Copper creates moisture and packs well. It's a soft metal, watch for excessive wear."