types of joints :  1, both ends are external joints  WW type   

                             2, both ends are internal joints   NN type

                              3, one end is external joints , the other with bottom   WDtype   

                             4, both ends are side cut from the trough  QdQd type

the bellows is tight  structure , low cost , corrosion resisting , great elasticity , low stiffness , allowing fatigue strength span up to 1000 times
Forming method: Hydraulic forming

We are  capable of customized special design for clients

We can offer the sample to the clients , then the clients would place a order to us .