Cân Thăng Bằng Khay Lồng (Cage Balance Scale)

This compact balance scale uses open cage-like pans and a PETG-on-PETG pivot, so no bearings or hardware are required.

Print it, add a single drop of lubricant, and it’s ready to compare tiny objects like coins, jewelry, or game tokens.

The long lever arm makes even minuscule weight differences clearly visible.

Ideal for education, tabletop role-playing, or a classic counterfeit-coin logic puzzle.