Please note: Standard Grade pins have no major imperfections but some flaws may occur, such as slight marks no bigger than 3mm, small offsets in the screen prints, etc. They are not noticeable without a high beam light.

Secondary pins have defects that are noticeable without a light, including medium underfills, oxidation of the metal, noticeable scratches/smudges/miscolorations of the metal/enamel and so on. They are split into "alpha" and "beta" secondaries, where alpha are very minor imperfections, and beta are more noticeable (but not defect-grades)