great for marine and industrial use, custom turbo or intercooler piping fabrication. Technical Specification: Product Type: Silicone Charge Air Cooler CAC Hose Coupler Hot Side Bellow. Temperature Range:- 65 deg. F to + 500 deg. F (260 deg. C). Reinforced Layer: 4-ply Aramid. Hose Inside Diameter: 3.5" - 4.5" (89mm - 114mm). Hose Outside Diameter: 3.9" - 4.88" (99mm - 124mm). Hose Length: 6". Number of Rings: 3. Wall Thickness: 4.5mm (+/- 0.5mm). UV and ozone resistant. Remark: Silicone hose is NOT compatible with fuel or oil.