For the cover and screw in the bottom edge of the air cleaner. 79-82 years Dakota/VZ50 has another long screw cap and air cleaner, but these works too. Suitable air purifiers Dakota/VZ50, Florida/MV50, Alabama/DS50, Texas, Colorado 67-78. We have compared more than 40 air purifier with its screws. Many are broken bolted, we note that the three screws we have put together is so original as we can get. The third screw at the bottom available on most, but not all air purifiers.Sometimes they are drilled.