Du-bro 956 Semi-Scale Tailwheel System for 40-90 Size Aircraft 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. SPECIFICATIONS: Length = 4.875" Height = 2.75" Wheel Dia. = 1.1875" Weight = 20.5 grams