* Black Pepper and Sandalwood Fragrance * Lasts for 20 Weeks Add a warm and earthy scent to your home with the Black Pepper and Sandalwood Diffuser Refill, brought to you by Dunelm's Aroma Archives range. Black pepper is a warm, earthy spice, which is rendered through steam distillation of the berries of the piper nigrum bush. This fragrance is enhanced by sandalwood: an oriental, woody note, which boasts milky, soft and rich, green top notes - obtained from the trees of the genus Santalum.