slotted fretboard blanks

flat or radiused

Hard maple fretboard blank

7mm thick

57mm at base

43mm at nut

487mm long

the 648 by 22 is suitable for a fender 

the flat blanks and 20 fret ones stop at the nut while

the radiused ones continue beyond it.

the best ones are simply the whitest, straightest grained

and most blemish free from each batch that arrives.