Robuta

https://www.bestbuy.ca/en-ca/product/d-addario-d-addario-xlb085-xl-nickel-wound-bass-guitar-single-string-085-gauge-long-scale-xlb085/10471906
D'Addario XL Nickel Wound Bass Guitar Single String - .085 Gauge, Long Scale. Manufacturer Model Number: XLB085
bass guitaraddarioxlnickelwound
https://www.guitarworld.com/artists/bassists/anthony-jackson-six-string-bass-origins
Along with Leo Fender, the late Anthony Jackson became one of the most important figures in the history of the electric bass
six string bassanthony jacksonguitar
https://laughingsquid.com/15-string-slap-bass-solo/
Davie504, the talented bassist who is constantly looking for new ways to play, demonstrated a truly unusual 15-string version of the instrument,
the loweststring bassstringsincredible
https://www.ampshopbassexchange.com/product/fender-jazz-bass-or-precision-replacement-albridge-parts-qc419p-4-string-quick-release-bridge-for-electric-bass-guitars-qc419p-polished/
High Density/Lightweight assembly with Low profile Barrel saddles made from solid Bell Bronze with string saver grooves. The saddles are sandblasted and coated...
fender jazz bassprecisionreplacementparts
https://ashokancenter.org/bass/
Molly Mason, Jay Ungar
string bassashokan center
https://www.stepwisepublications.com/bass.html
This free Bass fingering chart, along with the flashcards, can help bass players learn their notes and fingerings.
electric bassfingering chartstringflashcardsstepwise