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.