[BBasswood doesn't require grain filling and won't pop either. But it says 'mahogany' in the kit description. Though maybe not as we know it.

Pit Bull Guitars SHB-4 Headless Electric Bass Guitar Kit Includes:

Mahogany body
Maple Neck (bolt-on, C profile) and Rosewood fretboard
34″ Scale with 24 medium jumbo frets
Black Hardware
Overlord of Music Locking Bridge and Nut
2 volume and 1 tone knobs
Black Bass Humbuckers
All electronics (pots, caps, wires and solder)
Lead
Strap buttons
Set of Bass Strings

That top rear bout piece looks the most like mahogany of all the pieces.

Probably mahogany's 2nd cousin twice removed.