"substrate: h-k9l
Dimensions: 20.0 x 20.0 x 20.0mm
Surface quality: 60/40
Surface flatness: lambda/10
Beam deviation: <5 arc minutes
Optical performance:
Input/output surface: r less than 0.5% over 400 to 700nm at input/output surfaces at 0
Operating temperature: -20 to +50
