These Billet Specialties engine dress-up hose separators are designed to separate two hoses and mount them directly to the fCompatible with Rame or firewall. They are machined from 6061-T6 billet aluminum and fully polished for a detailed touch. Precision machined from 6061-T6 billet aluminum. Mirror polished finish. For .890" x .969" O.D. hoses. Stainless bolts. Sold individually. Tech Tip:A hose's listed size is always in reference to the inside diameter of that hose. Example, a 5/8” heater hose has an inside diameter (I.D.) of 5/8” while the outside diameter (O.D.) is 29/32” or .906. The O.D. is the dimension needed when purchasing hose separators. Hose Separator Size Guide: Braided AC Hose Diameter: Hose #DecimalFraction #6 .440" 7/16" #8 .540" 35/64" #10 .630" 5/8" AC Hose Diameter: Hose #DecimalFraction #6 .734" 47/64" #8 .890" 57/64" #10 .969" 31/32" Braided AN Line Diameter: SizeDecimalFraction -6 .562" 9/16" -8 .625" 5/8" -10 .781" 25/32" -12 .906" 29/32" -16 1.125" 1-1/8" Heater Hose Diameter: SizeDecimalFraction 5/8" .906" 29/32" 3/4" 1.015" 1-1/64"