The ComposTumbler is the World's best-selling, best-designed rotating bin composter. The key to making great compost fast is to have your organic materials contained so that heat builds up and the organic materials begin to break down. Air and moisture are the other two essential ingredients. The ComposTumbler is designed with air vents on the sides for the drum and on the door so air flow is unimpeded during composting. Drainage units on the door allow for any excess moisture to excite so materials won't get soggy. The result is perfectly balanced, contained rotating bin composter that turns organic throwouts into compost in 14 days. Specs. 12 cubic ft. (9.5 bushels, 88 gallons) Holds up to three 30-gallon trash bags, 43H x 42W x 33D Galvanized metal, rust-proofed drum sits 12 inches off the ground. Made in the USA.