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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