This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 01 June 2020 | 
| Upload Date | 28 May 2020 | 
| File Name | iPad_Spring_2020_13.5.1_17F80_Restore.ipsw | 
| File Size | 3.93 GB | 
| SHA256sum | 3d0698ee7407a7c1cacd5da6fc660fcac161c84df0b941fa4336a70eb043abe4 | 
| MD5sum | 00a13ff3fb4c55d09b860a76b19c5f61 | 
| SHA1sum | 31a0cf7f1754a9fcbee6713246cb53bb08dde91a | 
| Identifier | iPad8,9 | 
cd ~/Downloads.idevicerestore -e iPad_Spring_2020_13.5.1_17F80_Restore.ipsw and press Enter.