This is one of three fender extensions returned to Earth following the Apollo 17 mission. During the mission one of the four extensions on the Apollo 17 Lunar Roving Vehicle was accidentally dislodged. A substitute was constructed from material aboard the spacecraft. The fender was made of an epoxy-impregnated fiberglass, and attached to the lunar roving vehicle to prevent large quantities of lunar soil from covering the astronauts and the vehicle while in use. The extensions were returned to allow inspection following the mission.