常温下输送水及中性液体。内胶层为黑色，外胶层可选用黑色或红、黄、兰等浅色，亦可用EPDM合成胶。
Conveyance of water and neutral liquids under normal temperature. The tube is black in color and the cover is black, red, yellow and blue in color etc.and can also be EPDM synthetic rubber makes.