iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad Pro (10.5-inch, WiFi), released on 2018-05-01T17:05:57Z. The update package is 175.06 MB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f292e2c8932bb685dd02159aef7f1f0aac84b400.zip.