The Koala® trollies will fit all Koala® products including the KS & AS range seatbox, they will also fit similar seatboxes from the popular makes. They all come with 2 pneumatic wheels which will provide support and stability during transport and allows the trolley to be packed flat with ease. Each trolley comes with a removable and adjustable holdall support bar which will provide strong stability when moving your seatbox. The fully adjustable base support system allows plenty of comfort for your seatbox to prevent any damage from occurring.