Product review (5 stars): I was able to secure it to both ends and accordion up the last few feet to easily fix my vent
Used this for a long straight shot vent of about 17 feet. I was able to secure it to both ends and accordion up the last few feet to easily fix my vent. Is very durable and I hope will last a long time.  Also, was cheaper than my local hardware store by 50%. You can't beat that!