Specifications:

• Origin: CN(Origin)
• Use: optical window optical instruments
• transmission: high transmission
• surface: 40/20 no bubbles
• Size: D36mm
• sample: can offer for test
• polishing: both sides
• Notice: price upon size
• Model Number: BK7 K9
• Material: optical BK7 K9
• material: BK7 K9
• Edge: protection chamer
• color: clear