Shelf

 34 PODZOL  2 SAND  10 DIRT  15 COLOR_ORANGE  26 COLOR_BROWN  28 COLOR_RED  36 TERRACOTTA_WHITE  14 QUARTZ  18 COLOR_YELLOW  53 CRIMSON_STEM  56 WARPED_STEM

A shelf is a block that can store and display up to three stacks of items. Using an item slot exchanges its contents with the player's hotbar. Powering a shelf combines its three slots together and makes using it swap everything at once.

Two or three adjacent shelves can merge their slots together if all are powered, which allows for swapping six or nine items at a time, respectively.