These upgrade aluminum clamping wheel hexes fit:

Diameter of outer : 43mm

with a chrome-plated brass piston and cylinder surrounded by the lightweight aluminium case

Cap is CNC machined billet aluminum

Cross wrench

Estes Rockets - Space Corps Lunar Scout Model Rocket, Intermediate Kyosho These upgrade aluminum clamping wheelThe Lunar Scout series of remote space probes was critical to the success of the lunar landing program of the late 2020s. These automated probes mapped out the moon's surface in detail to identify prospective landing sites for the series of lunar missions that came to be known as the "Second Giant Leap". Inexpensive to manufacture and reliable to operate, the Lunar Scout was later adapted to explore Mars and its twin moons Phobos and Deimos. The Estes