This pack of 3 NOS Seuthe No. 116 smoke fluid is a must-have for train enthusiasts looking to enhance their model train experience. The clear liquid is compatible with O gauge locomotives and can be used with smoking cabooses and diners. Ideal for those who want to add a realistic element to their model trains, this smoke fluid is made from high-quality materials and is easy to use. Whether you are a seasoned collector or new to the hobby, this smoke fluid is a great addition to your collection.