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. Item Type: Air Pump Accessory DC 12V Battery Clamp Cable Length: Approx. 1.5m / 4.92ft DC 12V On Board Cable Length: Approx. 1m / 3.28ft Length Measurement Error: About 5% 1 x 12m Air Hose 1 x Check Valve 1 x Battery Clamp Cable 1 x On Board Cable 6 x Bubble Stone