25µm indexed (IN2) apertures / 400µm
https://www.ibtb.org/shop/414-m3-l18sp-400-2-25mm-indexed-in2-apertures-400mm-13052
https://www.ibtb.org/web/image/product.template/13052/image_1920?unique=a46b659
This 25µm is guaranteed a indexed with the use of (IN2) and directly supplied apertures to your lab by Gentaur's warehouse.
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