Witness Samples

Low Expansion
Witness Samples

$35.00$50.00

Our low expansion glass witness samples are made in America, offering high quality at an affordable price. Characteristics of our witness samples include:

  • Many Popular Glass Types: Select from a large assortment of the most popular glass types.
  • Laser Etched Part Number: No more problems identifying material. The part number is laser etched on the edge and can be cross-referenced to the material type.
  • Inspected per MIL-PRF-13830B: Each sample is inspected for surface quality.
  • Quantity Discounts: Available for orders of 11 or more. Please contact us for information.
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Additional Information

Weight 0.03 lbs
Material

7056, 7972 ULE, B270®, Borofloat® 33/ Supremax® 33, NSG-N Fused Quartz, Pyrex, S-8003N

Diameter

25.00mm ±0.20mm

Thickness

3.00mm +0.20mm/-0mm

Flatness

< 1 wave @632.8nm

Surface Quality

60/40

Chamfer

0.50mm ±0.13mm FW x 45°

Clear Aperture

80% min