Roof Fan Bird Screen, For Fan Type Upblast Fans, Compatible Grainger Part Number 1MBF2, 3ATU4, 3ATU5, 3ATU6, 3ATU7, 3ATU8, 4HZ56, 4HZ57, 4HZ58, 4HZ59, 4YY18, 4YY19, 5DVN1, 5DVN2, 5DVR0, 5DVR1, 5PV07, 5PV08, 6KWH8, Compatible Fan Grainger Part Number 1MBF2, 4HZ56, 4HZ57, 4HZ58, 4HZ59, 4YY18, 4YY20, 5PV07, 5PV08, Finish Zinc Plated, Wire Spacing 3/4 in, Compatible Fan Manufacturer Part Number 1MBF2, 3ATU4 to 3ATU8, 4HZ56 to 4HZ59, 4YY18, 4YY19, 5DVN1, 5DVN2, 5DVR0, 5DVR1, 5PV07, 5PV08, 6KWH8