High temperature, corrosion resistant, long lasting. Two-layer aluminum foil thickness, temperature ranges from -30 to 100 ℃. Built-in steel wire for reinforcement and durable performance. Perfect for heating, ventilation, air conditioning, kitchen, bathroom, greenhouse, grow room, grow tent, etc. Shape: Round Temperature range: -30 ℃ ~ 100 ℃ Pressure: 2500 pa Air: 30 m / s colour:Sier Material:Aluminum size:10*200cm Package Contents: 1 * Aluminum foil ventilation tube Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.