Name:	Sapphire Optical Circular Window
Diameter:	From 1 mm (.039”) to 305 mm (12”) in any optical axis
Thickness:	From 0.2mm up to 20mm
Flatness:	Varies by thickness but can be λ/10 @633nm or better
Parallelism:	Varies by size but can be as tight as 1 arc second
Surface Quality:	S/D 80/60~20/10 per MIL-PRT-13830
Quantity:	Quantities from singles to full large scale production runs
Materials:	Bk7, Fused Silica, Quartz, and Optical Glass
Delivery time:	Usually 4 weeks after deposit received