... 12 meter. The pump is made of nylon, which resist to acid, alkali,corrosion and freeze. C. Long ... and high reserves battery, store power big, which is large electric charge and long service life.Its ... is saturated,it will automatically cut off , which can protect the power supply and prolong the ... . The tank made of the special material which resist to acid, alkali,corrosion and have good ductility ...