Thermoid - Aeroduct Red 3" Steel Wire Reinforced Air Duct | SCEET12 

Only Aeroduct is standard original equipment on most new civilian aircraft and is the best replacement available. Aircraft quality Aeroduct wire-supported duct is flexible and easy to install.

• Priced and sold by the foot
• Maximum length: 11 feet
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Specifications

• 3 inch inside diameter
• -80° to +600°F
• Support: Copper coated or bronze plated, spring steel wire helix
• Cover: 2-ply woven fiberglass fabric impregnated with red silicone rubber
• Cord: Fiberglass cord coated with silicone