Esbit 1300-Degree Smokeless Solid Hobby Fuel Tablets are the original German-made solid fuel tablets. Available in 4-gram and 5-gram sizes, Esbit fuel tablets are virtually smokeless and odorless. The 4-gram tablets burn approximately 5 minutes, and 5-gram solid fuel tablets burn approximately 7 minutes; both the 4-gram and 5-gram sizes are ideal for hobby applications such as Wilesco engines, steam-launch boats, and hobby trains, as well as for starting campfires or generating an emergency heat source. Five-gram tablets are individually packed in waterproof packaging, giving them a 10 year shelf-life and making them excellent outdoor, survival or emergency essentials. All Esbit Solid Fuel Tablets work at high altitudes and sub-zero temperatures, are smokeless, and have almost no combustion residue. Esbit 1300-Degree Smokeless Solid Hobby Fuel Tablets light easily with a sustained flame from a match or lighter, can be snuffed out, and if kept dry, will relight when needed again. Ideal for the avid hobbyist and survivalist, tablets are available in three configurations: 20 Pieces Each 4g, 16 Pieces Each 5g, 60 Pieces Each 4g. Made in Germany; 2-year manufacturer’s warranty.