Metal Half Shelf for Wall Mount and Aerosol Can Safety Cabinets Fits PI77, PI7710, YPI77, YPI7710, 1975, 1976, 1977 cabinets without an X in their item numbers. This shelf only fits cabinets manufactured before 2019, which do not have a model number containing the letter "X". If you are unsure which model number you have, please contact customer service.