Our Pine Tree Smelters contain top notes of bergamot, lemon, white mint, grapefruit, heart notes of calone, clove leaf, thyme and base notes of subtle woods, balm, cedarwood, sandalwood and pine needle. Method of Use: - Place a number of Smelters in a burner (depending on the size of the burner) - Light a tea light (approximately 4 hours) and put it in the burner - Let the scent spread in the room Smelters last 2 to 3 tea lights. Each bag contains approximately 20 pieces Strengths: We choose to produce Smelters in 2 strengths (mild and strong). Conscious! Because not every room is the same size and every person has a different need. So it is highly recommended to include both strengths in your range.