Specifications:

• Use: optical window ,optical instruments
• surface: 60/40 without bubbles and hairlines
• service: ensure you can use
• sample: can offer
• polishing: both sides
• Model Number: Borosilicate Glass
• Material: Optical Borosilicate Glass 3.3
• edge: Protection chamfer or customization
• color: clear
• thickness: 3mm
• size: diameter 20mm
• Size: 20mm
• Origin: CN(Origin)