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Specification of our Pyramid prism as follow:*Material BK7
*Beam Deflection 180 degree +/- 5 sec
*Dimension Tolerances +/-0.1mm
*Clear Aperture >80%
*Surface Quality:60/40
*Surface Flatness ?/4@ 633nm
*Angle Tolerance 60 degree+/-3 minutes
*Chamfer 0.3mm+/-0.1mm
*Coatings Optional
