Bonsai Jack 1/4 inch Horticultural Charcoal. 1 Gallon 100 percent satisfaction guarantee Bonsai Jack products are tested and backed by real science. Made in the USA Tested and backed by real science. Available in 2 Quart, 1 Gallon, 2 Gallon, 3.5 Gallon, 7 Gallon, 14 Gallon and 28 Gallon SKUs