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Glass Marbles High Precision Laboratory Glass Beads Decorative Glass Ball For Mechanical Bearing Slide 4 5 6 7 8 9 10mm 50 / PK

Original price was: $2.95.Current price is: $0.99.

Category:


Price: 2.95 - 0.99

This product is high strength, high circularity, few impurities.
Product description: colorless, transparent, solid, high-strength, low wear, good chemical stability.
Application: grinding beads having a uniform size, smooth surface, high solid content material and ultrafine grinding dry grinding, wet grinding, compared with zirconium oxide beads to wear small machine model. Heat resistance, ear resistance, compressive strength and many other properties.
Chemical composition: SiO2 AL2O3 CaO BaO Na2O Zr.O2
Physical properties :

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.


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