Graphtech Acoustic Saddle Slab PS-9125-00 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 Available at Ant Hill Music!