Product Description Unmounted Optical Pinholes or Pinhole Arrays Slits width ranging from 5-1000um Application 1.Optical Systems and Educational Optical Experiments 2.For Spectrophotometer Image Analysis Optical Slits Dimension and Material 1. Slit Material:304 Stainless Steel 2. Thickness:0.05mm 3. Slit Width Available:5 to 1000um 4. Slit Length:3mm or customized 5. Outer Diameter:9.5mm or customized 6. Finish: can be blacked 7. Pinholes are also available.