Normal Duty Double Strap Vehicle Bracket DCP Range Description For 4.5kg and 9kg DCP fire extinguishers. Double strap. Vehicle brackets for safe and secure mounting and transportation of the following fire extinguishers: 2,5kg, 4,5kg and 9kg. As the name suggests, vehicle brackets are securely mounted onto vehicles to transport fire extinguishers safely. They are available in varying sizes and materials, to allow for quick and easy mounting and removal.