Representative photo. Please check item description for details.
Banner MINI-BEAM: Aperture; Circular; 0.5 mm (0.02 in) diameter; For Opposed Mode MINI-BEAM Sensors - QTY 20 (AP31-020)
https://www.branom.com/shop/27127-banner-mini-beam-aperture-circular-0-5-mm-0-02-in-diameter-for-opposed-mode-mini-beam-sensors-qty-20-ap31-020-18139
https://www.branom.com/web/image/product.template/18139/image_1920?unique=0b1a179
(0 review)