2 parts- a mass air flow sensor with housing and the engine air intake duct or aka resonator box. They both are part of the same system and attach to each other. They sit between the filter housing box and throttle body.
Used engine air intake duct/resonator box, no damage, normal wear, still works perfectly fine.
Brand new mass air flow sensor with used tube housing. The original sensor we broke while trying to figure out how to get it out of the casing/housing. Bought a new sensor and placed it inside the housing. All that is needed now would be to place it inline with the filter housing and the resonator box.