The body cocking, advancing, and mirror mechanisms have been cleaned, lubricated, and adjusted as needed. New mirror bumper and internal seals have been installed. The lens, shutter, aperture, and depth of field preview mechanisms have been cleaned, lubricated, and adjusted as needed. The inner elements have been cleaned. The film back and frame counter mechanisms have been cleaned and lubricated. New dark slide light seals and internal seals have been installed. The kit is in good working condition. It comes with a Standard Focusing Screen (42161).