VIVOSUN 2Pack 4In 25Ft Non-Insulated Flex Air Aluminum Ducting, 4 Clamps Included

Ducting Material: High-quality aluminum (High Temperature Resistant & Corrosion Resistant & Long Lasting); Clamps Material: Stainless steel (Rustproof & Corrosion Resistant & Heavy Duty). Ducting Feature 1: Three-layer Thickness (Aluminum Foil + PET + Aluminum Foil): Flame-retardant coating. Thermal Endurance: Temperature range from -22 to 266 Fahrenheit. Ducting Feature 2: Built-in steel wire for reinforcement and long lasting performance.