1、For Air Pump: These accessories can work in conjunction with MPQ air pump for aquarium, providing large output and high pressure compressed air. 2、Bubble Stone: Has strong gas capacity, high gas outlet pressure and large gas discharge capacity in deep water, with good air flowing stability. 3、Has 2 Cables: Can be used by connecting the corresponding battery or directly connecting to the vehicle. DC 12V, the low voltage is very safe. 4、Great Safety: The PU pipe with an inner diameter of 4mm. It is equipped with a stop valve, which makes the air outlet smoother and very durable. 5、Wide Utility: Very suitable for oxygenation in aquariums, hydroponics, fish farms as well as air assist in compost tea brewing and laser cutting.