25kg bag of Smokeless Anthracite Small Nuts Welsh Anthracite Small Nuts is a natural smokeless fuel, ideal to be used in cookers, boilers, & other closed appliances. Anthracite small nuts pack together tightly to create an intense & long lasting fire bed which is poular with those looking for efficient heat. A high performance fuel which burns with a high heat & low flame, & leaves little ash behind. Suitable for burning in smoke control areas, & also available in a larger size.