Designed for horizontal stove venting, this Okolona 4" x 4" pellet stove vent kit allows convenient through-the-wall installation and it is compatible with most pellet and corn, and multi-fuel stoves. Okolona is a venting system designed for stoves and inserts that use wood pellets and oil fuel. It is also built to vent biofuel products such as corn, switchgrass, cherry pits, soybeans, and coffee husks, to name a few. Rated for continuous feed use flue temperatures up to 570 degrees Fahrenheit. All Okolona components that come into contact with flue gases are built with an inner wall or corrosion-resistant super-ferritic metal. Okolona is engineered with features for a durable, safe, and aesthetically pleasing venting system. Okolona is a patent-pending system for stoves and inserts that use wood pellets, corn, and other biofuels, or oil as fuel. This perfect fit and finish are made possible with a laser-welded inner and outer wall.