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This Used to be "The Smallest Machined Dice in the World"

Each side is 0.3mm, with and error ±2μ. 20,000 of similar dice will fit in a one-centimeter cube. This evidence will surely stimulate production of high-performance compact items.
Data of What Used to be The Smallest Machined Dice in the World
Device: NV4000 (Mori Seiki Co., Ltd.)
Endmill: φ0.06mm Ball Endmill (NS TOOL CO., LTD.)
Time: 9 hours
Material: brass
Weight: 0.00016 grams
Size precision: 0.3mm plusminus 2μ