Rectangular Aperture, Inch

**Please note this part number has been discontinued and can now be orderered as part number 74-1137-000.
In addition to the original inch mounting holes of 61-1137-000, part 74-1137-000 has an extra set of metric mounting holes for increased versatility.

Maximum Open Aperture: 12 mm x 12 mm square
Materials
        Body: Anodized aluminum
        Blades: Brass

• Four Independent knife-edge blades
• Rectangular or square beam aperture
•Adjustable Slit