How durable is it? Does it tear easily? It uses thickened pvc fabric with built-in steel ring support and a reinforced core for a sturdy structure. Can it fit in tight spaces like crawl spaces or small attics? The ability to bend 360° makes it comfortable in any terrain, fitting narrow areas without extra parts, Ideal for tricky spots. Specification Material: pvc cloth + carbon steel wire Length: 16ft/5m Inner diameter: 6in/150mm, 8in/200mm, 10in/250mm, 12in/300mm, 14in/350mm, 16in/400mm,18in/450mm, 20in/500mm, 22in/550mm, 24in/600mm, 28in/700mm, 31in/800mm, 35in/900mm, 39in/1000mm Temperature range -22 - 302°F (-30℃ - 150℃) Features Built-in reinforced structural steel ring Thickened Pvc cloth is difficult to break or tear Easily attaches to the air lips on the exhaust side Ideal ducting for blower ventilator applications 360° free bending, bypassing various obstacles in the transport path Portable air ducts can be easily folded for storage and transportation Package include 1 × Exhaust Vent Hose Note - Minor errors can be error due to different batches and manual measurements - There may be chromatic aberration due to the difference between the recording lamp and the display, Please refer to the actual product