· MEETS REQUIREMENTS SAE-J20R3 · 1/4" INNER DIAMETER · .58" OUTER DIAMETER · HEATING 350F COOLING 65F · BURST PRESSURE 350 PSI · 250 PSI RECOMMENDED · BEND RADIUS 5 TIMES THE HOSE OD · CLASSIFIED SAE J2 R3 CLASS 4 · VMQ SILICONE TUBING WITH BRAIDED NYLON FOR EXTRA STRENGTH · MEETS OR EXCEEDS THE OPERATING REQUIREMENTS OF TMC RP303B Class I Grade II · SILICONE HOSE IS NOT COMPATIBLE WITH FUEL OR OIL · FLEXFAB SILICONE HEATER /COOLANT HOSE ARE RESISTANT TO CRACKING PEELING AGING IN TEMPERATURE FROM -65F - 350F