This is a replacement for metal landing gears for RC planes. It is extra tough because of the carbon fiber. It is lighter than most gears. It is 7 3/8 inches wide at the bottom and 5 1/4 inches tall. It had pre-drilled holes for the axles and is left blank at the top to let you match it to your plane. It has the most beautiful matte finish. Many of my friends that fly use them.