Du-Bro Semi-Scale Tail Wheel System (20-60 Size Aircraft) Part No: 955. 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 = 4.250" / Height = 2.375" / Wheel Dia. = 1" / Weight = 18.5 grams