【High quality material】This air pump valve is made of plastic material, long service life, beautiful appearance.wireless aquarium pump 【4mm pipe】 The air inlet of the control valve can be connected to 4/8mm air pipe, and the air outlet can be connected to 4mm air pipe.mini air pump 【Adjustable shunt】 This air pump valve is equipped with the controller, accurately adjust the air volume, easy to operate.aquarium air pump 【Air pump accessory】 It is suitable for aquariums and aquaculture and is used in conjunction with aquarium oxygen pumps.