For carrying multiple combinations of 100mm & 140mm dia. gas cylinder bottles.Decks are made from 12mm thick, impact-resistant polyethylene sheet material, for strength and low noise operation.Zinc plated steel tie bolt fixings and handles.Handles to both ends.On four 125mm dia. elasticated rubber tyred swivel castors (2 with brakes) .All black decks - blue and red top deck (for empties) available on request.