1) Plate Beamsplitter

Material : Float Glass
Thickness : 1.0 +/- 0.2mm
Dimensional Tolerance : +/- 0.2mm
S/D : 80-50 or better
Surface Accuracy : 4 waves/25mm
Parallelism : +/- 3 arc minutes
Coating : As your required

2) Cube Beamsplitter

Material : BK7
Angle Tolerance : +/- 5 arc minute
S/D : 60-40 or better
Surface Accuracy : 1 wave
Outside Surfaces: 1/4 wave MgF2
Coating : As your required