4015A:

-1-button mechanism allows quick and convenient folding

-Hi and lo handgrip for easy seating and standing up

-Height adjustable: 740~865mm

-Width: 560mm; Fold width: 100mm; Depth: 510mm

4015B:

-2-button mechanism allows easy movement through narrow spaces but great stability

-Hi and lo handgrip for easy seating and standing up

-Height adjustable: 820~1000mm

-Width: 640mm; Fold width: 100mm; Depth: 490mm