Material: Stainless Steel, copper, molybdenum, gold, glass and so on Thickness (mm): 0.05mm, 0.1mm or customized Outer Diameter (mm): 9.5mm or customized shape and dimensions Slit Length (mm): 3.0 mm or customized Slit width: 5um,10um,25um,50um,75um,100um,200um,500um,1000um or at customer’ request Type: Unmounted, mounted slits are also available Finish: Can be black finish or normal finish Precision pinholes, high power pinhole apertures or pinholes arrays are also available Apart from various metal precision slits and pinhole apertures, we also provide optical slits and pinhole in chrome-coated optical glass.