• 5-ply Supurr-Flex(R) flex dryer transition duct <br> • 4 in. diameter x 50 ft. <br> • 5-ply aluminum duct offers superior fire-suppression<br> • Maximum velocity of 4,000 FPM<br> • Compresses to 25 ft., +/-15 in.<br> • Operating temperature range 0deg F to 265deg F<br> • UL(R) 2158A for dryer venting when used in installations of 8 ft. or less<br> • Also suitable for bathroom venting, HVAC systems, and general-purpose venting<br> • Nonretail bulk;

