Silicone Rubber Blue Coolant Hose, 1.64 Inch OD, 1.25 Inch ID, 36 Inch Long

The inside diameter is 1.25 inch and the outside diameter is 1.64 inch, with a 36 inch overall length.

The ID is 1.25 inches and the OD is 1.64 inches, and the hose comes in a 36 inch length. It is a 4 ply silicone coolant hose with polyester fabric reinforcement.

Continuous operating temperatures for this hose range from -65°F to 350°F.

For typical over-the-road and vocational truck applications, that range covers just about everything you'd run into. Most engine coolant systems operate well within those bounds, and the 4-ply silicone construction with polyester fabric reinforcement helps it hold up at both the low and high ends of that span without getting brittle or soft. Cold-start conditions in harsh winters and high-load summer temps are both well within what this hose is rated to handle continuously.