The Velociti GARA Nylon Insert Rubber Grip Reins are made from non-stretch, pimpled rubber with a nylon core for extra strength and a softer, more flexible rein. These reins feature hook stud billets and stainless steel fittings. Available in Black or Havana. Size Guide Available in the following sizes: Pony sizes: 42" x 1/2", 48" x 1/2", or 48" x 5/8". Horse sizes: 54" x 1/2", 54" x 3/4", 54" x 5/8", or 54" x 7/8".