Material: (surface treatment) non-flammable rubber fiberglass cloth
1. Airtight - can completely seal the gas in the air duct to reduce gas loss.
Increase wind source and wind pressure, and have waterproof effect.
2. Fireproof - This material uses fiberglass cloth coated on both sides with a layer of natural fire resistance.
Rubber, its long-term use temperature can reach 250 degrees C (base fabric).