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Banner MINI-BEAM: Aperture; Horizontal Slotted; 1 x 6.4 mm (0.04 x 0.25 in); For Opposed Mode MINI-BEAM Sensors - QTY 20 (AP31-040H)
https://www.branom.com/shop/27131-banner-mini-beam-aperture-horizontal-slotted-1-x-6-4-mm-0-04-x-0-25-in-for-opposed-mode-mini-beam-sensors-qty-20-ap31-040h-18143
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