High quality sturdy 25 x 25 steel tube construction. Fits all KOALA Products KS & AS Range seat box including some other popular makes. Features 2 pneumatic wheels. The adjustable handle height ranges from 85 to 105cm. It also includes a removable, adjustable holdall support bar and a fully adjustable base support system. The width between the wheels can be adjusted from 51 to 66cm, and the depth from 28 to 46cm. The external width of the two centre support bars is 25cm. Dimensions: W51/66 x D28/46 x H85 x 105cm.