Argento Series AP ARGENTO PURE SILVER – HAND POLISHED – MEDIUM TENSION AH ARGENTO PURE SILVER – HARD TENSION AM ARGENTO PURE SILVER – MEDIUM TENSION SH ARGENTO EXTRA FINE SILVER PLATING – HARD TENSION SMH ARGENTO EXTRA FINE SILVER PLATING – MEDIUM-HARD TENSION SM ARGENTO EXTRA FINE SILVER PLATING – MEDIUM TENSION