Bone Nut and saddle blanks.
Bleached or unbleached.
Bleaching the bone blanks slightly softens the material. Apparently unbleached bone gives a warmer sound.
Bleached Bone blanks will have uniform white colour, while unbleached will be mottled yellowish.
The choice is yours!
Dimensions:
Nut - 54x10x6.35
Saddle - 90x11x3.5mm