The armrests of this walker are able to height adjust independently, allowing the walker to be custom fit to a number of user requirements. Adjustable from 1000 to 1300mm (391/2 to 51') in 30mm (11/4') intervals. External width at arms 650 to 900mm (231/2 to 351/2'). Internal width at arms 340 to 455mm (131/2 to 18'). Four swivelling castors 100mm (4') in diameter, two of which are fully braked. Footprint 810 x 850mm (32 x 331/2'). Weight 16kg.