Casing Tube 1.We are manufacturer 2.BW,NW,HW,PW,SW,UW,ZW 3.NX,HW,PX,SX, 4. 46, ... .0mm NW: O.D.88.90mmHW: O.D.114.30mm PW: O.D.139.70mmSW : O.D.168.30mm UW: O ... used in geotechnical applications. DCDMA Casing tube(BW,NW,HW,PW,SW,UW,ZW) & (NX,HX,PX,SX)