Panasonic FV-NLF04G WhisperLine 4-Inch Duct Inlet Grille Accessory for WhisperLine series Subtle, unobtrusive and blends in for a natural look Compatible with Panasonic PC-NLF04S and PC-NLF04D WhisperLine Accessory Kits Pattern: slotted with beveled edge and white finish Covered by a manufacturer warranty for period of three years from the date of the original purchase