PDO7P APS PAA Air Operated Diaphragm Pump for DEF btpcat_other_354305291 Excellent rust & corrosion protection Excellent rust & corrosion protection Shell Morlina S3 BA oils are formulated with an effective additive package to help prolong the life of bearings and circulating systems through: Enhanced water separation characteristics that help ensure that critical oil films are retained between highly loaded parts in heavily contaminated environments Formulated with a unique Shell additive system that is both zinc free and chlorine free Provide excellent engine cleanliness 3 4"polypropylene air operated diaphragm pump for DEF 8 GPM flow rate