Du-Bro Semi-Scale Tail Wheel System (60-120 Size Aircraft) Part No: 957. These complete ready-to-install Semi-Scale Tailwheel Systems are durable and great looking. Comes with rudder bracket and springs for control between rudder and tailwheel steering. Tailwheel included. Length = 5.625" / Height = 4" / Wheel Dia. = 1.625" / Weight = 35 grams