National Reso-Phonic's signature slides! Solid raw brass for a warm tone, or Solid Stainless steel that adds volume and punch. Tapered (on the inside for more mass and better fit) guitar slide. Domed top and petite size for superior single note articulation. These new versions can be sanded and polished if the accidental drop or ding happens. 

Regular size = 5/8 inch Inner diameter