ZL0018 series hose coupling are used for connecting the nozzle and the hose,the ... flow indicator,the pipe,and other equipment. ZL0018 series hose coupling are used for connecting the nozzle and the hose,the ... The sealing material is NBR with reliable sealability. 5. Different coupling such as R of BSPP standard thread can be ordered ... 4" 50pcs/carton (2)1" 32pcs/carton ZL0018ZL0018A ZL0018 Hose Coupling