8 inches x 2.25inches cylinder.The perfect pump for the first time or advanced pumpers, American Pumpers Association.Clear vacuum cylinder with universal incremental measurements.EZ-Squeeze pressure bulb with push-button release valve.Flexible non-crimping air hose.Flanged base with a removable soft ribbed donut.Stretchy enhancer with EZ grip handles.SAN cylinder, Silicone enhancer, donut, Phthalate-Free.