3" &gt; 3 1/4" (76 &gt; 83mm) HPS High Temp Straight Reducer Silicone Hose 2-1/4" Blue Temperature Range: - 65 deg. F to + 350 deg. F (177 deg. C) Made of 4-ply reinforced and knitted premium polyester fabric with high temperature silicone rubber Hose Inside Diameter: 3" &gt; 3.25" (76mm &gt; 83mm), Hose Outside Diameter: 3.39" &gt; 3.67" (86mm &gt; 93mm), Wall Thickness (mm): 5 Hose Length: 2-1/4" , Color: Blue Silicone hose is compatible with water or anti-freeze such as coolant. Silicone hose is NOT compatible with fuel or oil.