Stacking is a line-style Icon from Core Line set.

The Stacking icon shows two stacked rounded rectangles, each with a centered tab-like detail. Drawn in the line style on a 14px grid with a 1px stroke so it remains clear and spacious at small sizes. Use it for save controls, backups, storage interfaces, file duplication, and layered content displays. It belongs to Core Line set in the Core family.