Lot Glass Marbles Transparent Laboratory High Precision Glass Beads Ball Set
Description
- Gravity: 2.8g / cm3
- Hardness: >= 720kg / mm2
- Refractive index: Nd>=1.50
- Round rate: >=99%
- Package: 50pcs ( 4mm, 4.5mm and 5mm are package as 100pcs)
- Specifications:
- Solid transparent
- Category: A-class high-precision
- Accuracy error: >=0.02mm
- Usage: Use for laboratory testing, turntable support, slide to mechanical bearings, decoration, etc.
Package Includes:
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