iPad iOS Firmware iPad ipsw firmware download that provided by Apple, when you do the relevant operation at your own risk.

iPad Pro 3 (11-inch)

iPad Pro 3 (11-inch) Type and Models :
  • A1980
    • iPad8,1
    • iPad8,2
  • A1934,A1979,A2013
    • iPad8,3
    • iPad8,4

The signed firmware that you can restore the file by MFC Software or by iTunes.