Gas bottles mounts on sliding try -

2 x 4 kilogram gas bottles on a sliding tray for easy access to the gas bottles. Positioned at just the right height for changing the bottles. The slide locks in position when in, and when fully extended. It comes with a gas fuse as standard for safety, also with the correct spanner for easy changeover of the bottles. Other manufacturers may have only one gas bottle and will not be on slide, with no spanner.