The rattle is composed of a series of hollow, interlocked segments made of keratin, which are created by modifying the scales that cover the tip of the tail.nSpecifications:nnSold individuallynThe photos shown are examples of what your specimen will approximately look like. Each rattle is unique and will vary in size, shape, color, etc.nnRattles may exhibit varying degrees of pitting or flakingnThe set includes 1 medium and 1 small rattlennAverage Small Length: 0.5–1.4 in. ( 1.3–3.6 cm)nnAverage Medium Length: 1.4–2 in. ( 3.6–5.1 cm)nnAverage Large Length: 2–2.8 in. ( 5.1–7.1 cm)nnAverage Extra Large Length: 2.8 in. and up ( 7.1 cm and up)