EPDM,NBR,NR, CSM,VITON,SILICON. Size:Size: DN32-DN3000 Pressure: PN10,PN16 Pressure Test: 15Bar, 24Bar. EPDM,NBR,NR, CSM,VITON,SILICON.Size:Size: DN32-DN3000Pressure: PN10,PN16Pressure Test: 15Bar, 24Bar.End Connection: Slip On, Flanged, Inserted.You can refer to http://www.hiwaflow.com for detail specifications. Duckbill Check Valve, Slip on Type