About this item Base Info : Overall Diameter: Approx. 27mm/ 1.06″, Suitable for 4mm/0.16 inch soft pipe; Package Included: 3 x 370 Mini Air Pump Motor Specification : Rated voltage: DC 6V; Working Current: 460MA; Operating Voltage Range: DC3-6V; Load: Air Pressure: 300mmHg; Noise: Feature : No wear and small vibration ensure the low noise and long life span of 50,000 times. Base Info : Overall Diameter: Approx. 27mm/ 1.06″, Suitable for 4mm/0.16 inch soft pipe; Package Included: 1 x 370 Mini Air Pump Motor Widely Application : Mini electric vacuum pump usually used for water priming pump, automotive pump, RC toy experiment pump, aquarium bonsai rockery, DIY projects.