Full-range rechargeable models. Aluminum valves, handles and levers are lightweight yet extremely durable and corrosion-resistant. Heavy-duty plated steel siphon tubes are threaded versus crimped providing a secure connection. Large neck opening more easily accommodates recharge. Color-coded nameplates make it easier to identify agent type and applications. Engineered-grade polymer hose strap does not bend or scratch cylinders. Square thread design makes removing and installing valve quick and easy. Large pull pin and handles are easy to operate with gloves. 2 1/2 lb. and 5 1/2 lb. cylinder geometry provides quicker drying after hydro-test.