The Grainger 14H003 is a 14-inch diameter, 3-blade, right-hand rotation, aluminum propeller for radio-controlled model airplanes. It has a pitch of 6 inches. The prop is designed for .40 to .60 size 2-stroke glow engines up to 1.20 cubic inch displacement, turning up to 15,000 rpm. It's lightweight and durable, made from 7075-T6 aluminum alloy. The propeller is balanced for smooth operation. It's manufactured in the USA and imported. Overall, this propeller is well-suited for many .40 to .60 size RC model airplanes.