Rubber Joint electrical machinery Hose: 1) Materials: silicone, NR, NBR 2) Functions: passing air, jointing ... .Material:NR,EPDM,MVQ,SBR,CR,NBR etc.3.Certifications:FDA.ROHS.ISO9001,ISO14001,UL4.Characterstic:Ozone resistant,High/Low temperature ... to send me an E-mail. Rubber Joint electrical machinery Hose