This optional extra bag will fit onto almost any 4 wheel rollator (please check measurements if unsure). It is made of a vinyl leatherette and can be easily opened and closed with the stud fastenings. The bag measures 432mm x 297mm (17" x 11") and the gap between the two hanging attachments is 330mm (13"). In cases where the foam backrest interferes with this you may also be able to use it on the lower down cross bars. (please note you are bidding on the bag, not the rollator). Order more than one and pay no additional postage.