Large Aquarium Air Pump Check Valve Protect your air pump by preventing aquarium water from siphoning back during a power outage. Small and compact / Made of durable plastic Compatible with standard aquarium hoses with 4 mm inner diameter Color: red Package included: 7 x check valve < br/>Note: Since the above size is measured by hand, the size of the item you received might be slightly different from the above. Meanwhile, please be reminded that due to lighting effects, monitor’s brightness/contrast settings etc, there could be some slight differences in the color tone of the pictures and the actual item. Your understanding will be highly appreciated. Package including
