This Tsuba (guard) is made of thick cow leather. Cow leather is extremely resistant and durable, providing good shock absorption. Although a Tsuba does not seem essential for the Judo no Kata, it is generally used to give the wooden sword a closer aspect to the Katana.
Moreover, as Tsuba are made from leather, a "living" material, each product will be unique. So don't be afraid of having the same Tsuba than everyone else.

The rubber ring (Tsubadome) is offered as an option in white.