... Tube 1.We are manufacturer 2.BW,NW,HW,PW,SW,UW,ZW 3.NX,HW,PX,SX, 4. 46,56 ... Type: BW : O.D.73.0mm NW: O.D.88.90mmHW: O.D.114.30mm PW: O.D.139.70mmSW : O.D.168.30mm UW ... : O.D.176.20mmZW: O ... in geotechnical applications. DCDMA Casing tube(BW,NW,HW,PW,SW,UW,ZW) & (NX,HX,PX,SX)