The Illum Basilica Fragrance Diffuser Refill 500 ml is designed for use with the Illum Basilica Fragrance Diffuser, providing up to 500 ml of pleasant and calming scent for your home. It contains a blend of natural essential oils, including basil, lavender, and rosemary, creating a relaxing atmosphere in any room. The refill lasts up to three months and is easy to use by inserting it into the diffuser. It is a stylish and modern way to keep your home smelling fresh and inviting.