100% brand new and high quality Color: See pictures Great one way check valve for aquarium air pump; Protect you air pump by preventing aquarium water from back siphoning during a power outage; Small and compact It's easy to install Compatible with standard aquarium air pipe of 3.5-4mm inner diameter Size:See the picture below Quantity:10Pcs Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!