These are some guitarish pedals but no reason they cant be used on bass!
Tone Freak Severe hi-gain distortion. Sounds nice and thick with plenty of low end thump. Velcro from previous owner. $165
Way Huge Green Rhino in great condition. Cuts through them mix great due to all the little tweaks you can do to it. Fattens up your single coils and makes ur HB's sound thick. $80