If there is any item that so ubiquitous that it is almost universal across the wide range of Pride Mobility scooters and power chairs, then this is it. This little armrest lock knob is used on almost all Pride, Go-Go, Jazzy, Jet, and Quantum models.
Every scooter and power chair made or marketed by Pride Mobility has a seat, and most every seat has armrests. These humble little lock knobs are the ones that retain the armrest bracket on either side of the seat, and they allow the armrest weldment to be adjusted closer together or farther apart to suit the user's comfort requirements.
A very small part indeed, but one no one wants to be without.
⚠ WARNING California Residents:
Proposition 65 Warning