Commercial outfitters swear that NRS Barrel pumps are built to last, get wet, and get used. The NRS Barrel pump combines a wide base for sure footing while inflating a raft. The 168 cm flexible hose tucks into the webbing carry handle for storing on your raft. This 12.7 cm diameter pump stands 76 cm high and has a stroke volume of 2.03 Gal (7.7 liters). This hand pump does not have a check valve. A check valve is necessary on military valves that don't have a one-way inflation feature. There is a spare O-ring gasket in the bottom of the pump cylinder. If you need to re-lubricate the pump, we recommend lithium grease. 5-year warranty. Volume: 2.03 gal (7.7 liters) per stroke Action: Inflate and deflate (deflation requires the assistance of an additional hose) Pump Dimensions: 12.7 cm Dia. x 76 cm Tall Hose Length: 168 cm Weight: 4.5 kg Warranty: 5 year Category: Manual Pumps Features: Wide base Carry handle