The Panasonic PC-NLF06S installation kit allows you to install your ventilation fan with ease, especially with all the necessary compoenents within reach. Most premium bathroom fans cannot function optimally without the proper accessories. This accessory kit features a 6" inch single inlet grille, back draft damper, clamp and zip ties. Fully constructed from 24-30 gauge aluminium, the PC-NFL06S can be used with the Panasonic's FV-20NLF1 340 CFM In-Line fans. You'll be sure to be getting the full potential out of your bath fans with the Panasonic PC-NLF06S WhisperLine Installation Kit. The Panasonic PC-NLF06S is backed by Panasonic's 3-year manufacturer warranty.