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Polarizing cube beam splitters, 1 set of 5 pcs., each in its original, not opened package, made around 2000 by Melles-Griot, U.S.A. (picture #1). Designed for 670 nm, red diode lasers, size 10x10x10 mm. The optic is identical to what is displayed in picture #2, which is sold separately, not within this set. Picture #2 is intended to show an identical optic as those of the actual 5 pcs. set. Original data sheet attached (picture #3). Sold as 1 set, for laser professionals.