BuildCraft version: 7.99.17
Forge version: 1.12.2-forge1.12.2-14.23.4.2705
Link to crash report or log: N/A
Singleplayer or multiplayer: Singleplayer
Steps to reproduce: Place item.volume_box.name. Try to break it. Nothing happens...
Additional information: None

It's not technically a block, but a sort of separate thing. Shift+right click it with the marker connector to remove it.