Crafting using Polished Blackstone Bricks, Polished Blackstone Bricks, Polished Blackstone Brick Slab, Polished Blackstone Brick Slab, Polished Blackstone Bricks and Polished Blackstone Bricks, arranged in the pattern shown. Produces 3× Blackstone Brick Arrow Slit.
Crafting 
Blackstone Brick Arrow Slit ×3 guaranteed| source | count | chance | conditions |
|---|---|---|---|
| Blackstone Brick Arrow Slit | 1–1 | 100% | — |
Drops itself when broken.
mcwwindows:blackstone_brick_arrow_slitmcwwindowsmcwwindowsmcwwindows:blocks/arrow_slit minecraft:blocks/mineable/pickaxe minecraft:blocks/walls
Recipe JSON (1):
{
"recipe_type": "minecraft:crafting_shaped",
"pattern": [
" AA",
" BB",
" AA"
],
"ingredients": {
"A": {
"item": "minecraft:polished_blackstone_bricks"
},
"B": {
"item": "minecraft:polished_blackstone_brick_slab"
}
},
"conditions": [],
"sequence": null,
"group_name": "arrow_slit",
"experience": null,
"cooking_time": null
}