Constructed to transfer the right frequencies more efficiently from the string to the musical instrument and has been proven to increase the harmonic sustain. * This is a 1/8" thick slab of Black TUSQ XL that you can fabricate to just about anything from. * Thickness: 3.17 mm (1/8"); Length: 101.60 mm (4"); Height: 12.70 mm (1/2") * Model: PT-9125-00