... 1 2,low weight3,small external diameter/cross section dimension 4,low flow resistance thanks to smooth inner surface 5,low ... most common … substances 6,easy installation 7,scuff resistant 8,chemical resistant 9,ageing, ozone and UV-resistance 10,resistance to temperature from ... 23.51/88.50.332130008412000250.9845XDN4.9-21 MPa-34.93/1610.50.412130008412000451.7755XDN6.4-21 MPa-46.41/4120. ...