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Small Inside Diameter Molded Coolant Hose Specially Designed OEM Style Factory-Molded Hose to Fit Today's Smaller Tighter-Fitting Engine Compartments Can be used for coolant water and air applications. Approved for marine applications. Similar to OEM specifications Has all the quality features of Gates molded coolant hose Engineered to resist electrochemical degradation – the leading cause of hose failure Inside diameters range from 1/4" to 1" Meets SAE 20R3 Type EC Class D-1 and D-2 specifications Temperature rating: -40°F to 275°F (-40°C to 135°C) in coolant hose applications Note: Gates recommends replacing standard worm drive and spring loaded clamps with PowerGrip ® SB clamps each time a new coolant hose is installed. Caution: Do not use for fuel or oil transfer applications.