The Continental 532-027-324-17589 Def Dispensing Hardwall Hose 3/4IN X 17.5Ft is specifically designed to convey the high-purity, aqueous urea solution DEF. Hose tube compound is specially formulated with low extraction EPDM and peroxide cured to provide superior extraction levels to significantly reduce contamination. Flexible softwall construction provides superior handling in standard dispensing and reeling applications.