We are Fuzhou Zhengyin Metalworks Co.,Ltd. we are supplying:

1, Camlock couplings (cam and groove coupling) 
2, Guillemin coupling, 
3, Safety clamp (Norm DIN2817)
4, Tank truck coupling (Norm DIN28450)

We also supply accessories as followings:

a) Bauer type coupling
b) Universal crowfoot coupling (US type and European type)
c) Sand blast coupling
d) Double bolt clamp
e) T-bolt ...