BROAN-NUTONE 516L 6' x 25' Metalized Air Connector 6 inch x 25' metalized air duct connector, puncture resistant laminated metalized polyester product, used when insulation is not required, permits duct to be used as an entire system or to connect boxes, diffuses, inlets or other terminal Devices, carries UL label 181, class 1 connector. Features Manufactured in United states Easy To Use Highly Durable From The Brand Name: Broan-Nutone USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.