1, flexible and lightweight 2, black tube 3, density @ 400kg/cbm 4, RoHS certified product 5, factory ... to port is 290km Small NBR/PVC tube (follow picture is 4.3mm inner diameter by 3mm wall ... , acid resistance7,alkali resistance8, working temperature is -40~110degree, 9, Tube Insulation Technology DateStandard: GB/T 17794-1999NumberTest ProjectTest standardResult√/×1Apparent ...