This soft plastic tube, transparent and innoxious, has steel ware¡ ¡ SCR-ewly inserted in the PVC boby. It fits to the temperature range of 10¡ æ -+65¡ æ . The characteristics of it are high in elastic, rub-resist and an excellent ability of resis- ting solvent(mostly are¡ ¡ Chemical additive). It can be widely used in the vacuum pumps in farming, watering, shipping, oil chemical indu- stry, plastic processing machinery and sanitary equipments for food- stuff, ect.