Gemfan MinJae 5129.2-3 are lightweight tri-blade 5" racing propellers developed in collaboration with Korean racing pilot Minjae Kim. Weighing 4.12g, they are 10% lighter than standard racing propellers according to the manufacturer, resulting in lower moment of inertia and faster, more precise response to control inputs. The 2.92" pitch is suitable for racing quads and agile freestyle; the manufacturer recommends them for 2207 size motors and quads with an all-up weight of around 500g. They are made from durable polycarbonate.