Roasted Maple Fretboard blanks 9mm thick 555mm long 68mm wide.

Roasted Jatoba Fretboard blank is 9mm thick 520mm long and 70mm wide

Heat treating, or roasting or torrifying 

is  a heat treatment which artificially ages the wood (tonally)

it darkens the wood and makes it look antiqued.

Jatoba is a central American hardwood with high strength 

and capable of achieving a good finish.