... ,Economic price. 3,Good elasticity. Auto moulded rubber bellow : Name Auto moulded rubber bellow MaterialNR,SILICONE,EPDM,SBR,NBR,CR,BR,IIR ... aging-resistance 3.Good shock-absorption 4.Different colors and sizes The major marketWestern Europe ,Southeast Asia PackingPlastic bag+paper carton ... information ,please feel free to contact me. Auto moulded rubber bellow