Create the aroma of a majestic winter forest with this bestselling fragrance[Comma] Birchwood Pine. This NEST x Pura Smart Home Fragrance Diffuser Refill Duo features the iconic scent’s blend of white pine[Comma] fir balsam[Comma] and birchwood over a base of rich musk and amber. This exquisitely scented NEST x Pura Smart Home Fragrance Diffuser Refill Duo lets you replenish your current fragrance or switch to a new one. Includes two vials to be used in the Pura Smart Home Fragrance Diffuser for 220+ hours of scent.Details: Includes two vials for 220+ hours of scent.