... caps 1.Appling for lead acid storage battery,UPS battery,Motorcycle battery,E-bike battery 2. HNBR, NBR, Silicone, EPDM, VITON, CR, ... plugsCertificateISO9001:2008ApplicationAppling for lead acid storage battery,UPS battery,Motorcycle battery,E-bike battery Good function of sealing and attenuating shock.Advantagesa ... samples.MatetialNBR, NR ,EPDM ,SBR ,SR ,CR ,IIR ,etc. E-bike battery rubber plug caps