Great for paintball scenario, tactical or recreational. Flexible remote hose allows you to carry your air/co2 bottle on a rear harness and get the weight off your marker.
Mainly useful when using marker loaded with rails and accessories.
Hose coupling swivels which allows you to maneuver through even the most difficult terrain. 
Comes with a SLIDE CHECK valve - important for alllowing you to "dump" air in the hose prior to removal.
It is very durable and works with all compressed air and Co2 bottles.