Giottos AA1903 Rocket Air Blaster Large-Red Overall 7.5 inches long with a 2.5 inch nozzle Produces a large blast of clean directional air Instant rebound of bulb pressure One way valve brings clean air and does not re-distribute the dust Made of high grade long life silicon rubber Stands upright 7.5-Inch long 2.25-Inch long nozzle 2.4-Inch diameter Durable long-lasting construction