Pp male coupling :
1. Color : black or request on customer
2. Size: 20*1/2" -110*4"
3. Certificate: ISO9001
4. Easy to install
5. Size: 20*1/2" -110*4"

advantages:
1. High preuusre
2. Non -toxic, healthy
3presure to resistance
4. High ductility , Excellent flexibility
5. High speed resistance of crack transport ability
6. Long service lifespan: more than 20 years