HPS High Temp 4-ply Reinforced 1-1/2" &gt; 2" ID x 4" Long Silicone Reducer Coupler Hose Black (38mm &gt; 51mm ID x 102mm Length ) Hose Inside Diameter: 1 1/2" &gt; 2" (38mm &gt; 51mm). Length: 4" Color: Black. Wall Thickness: 5mm Max Temperating Rating: 350F. (177 degree Celsius) Reinforced Layer: 4-ply Polyester. Meet or exceed SAEJ20 standard, ideal for heavy duty extreme temperatures and high boost condition. Silicone hose is compatible with water or anti-freeze such as coolant. Silicone hose is NOT compatible with fuel or oil.