pvc water hose .Minimeter of the hose's internal diameter. 2.it means low pressured plastic-coated hose. 3.in times megapascal of operation prevsure.TECHNICAL INDEX OF EACH SPECIFICATION&VARIETYEPECIFICATIONS&TYPENOMINAL INTERNEL DIAMETER (mm)OPERATION PRESSURE (MPa)DRMOLITION (MPa)FIXED LENGTH (M)25DTG-0225±1.00.20.620±0.2 50±0.2 100±0.525DTG-0325±1.00.30.925DTG-0425±1.00.41.230DTG-0230±1.20.20.630DTG-0330±1.20.30.930DTG-0430±1.20.41.240DTG-0240±1.50.20.640DTG-0340±1.50.30.940DTG-0440±1.50.41.250DTG-0250±2.00.20.650DTG-0350±2.00.30.950DTG-0450±2.00.41.265DTG-0265±2.30.20.665DTG-0365±2.30.30.965DTG-0465±2.30.41.276DTG-0276±2.30.20.676DTG-0376±2.30.30.976DTG-0476±2.30.41.2100DTG-02100±2.50.20.6100DTG-03100±2.50.30.9100DTG-04100±2.50.41.2125DTG-02125±2.50.20.6125DTG-03125±2.50.30.9125DTG-04125±2.50.41.2150DTG-02150±2.50.20.6150DTG-03150±2.50.30.9150DTG-04150±2.50.41.2200DTG-02200±2.50.20.6200DTG-03200±2.50.30.9200DTG-04200±2.50.41.2