Silver M-phone is a mid-ranked weapon for Cait Sith, providing 28 Attack, 106 Atk%, 14 Magic, and 8 unlinked materia slots with Normal growth. It can be bought for 3,300 gil at Junon after obtaining the Highwind or found at Shinra Manor.
Silver is a chemical element with the chemical symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it possesses the highest electrical conductivity of any element and the highest thermal conductivity of any metal.
Silver often carries connotations of "second-best", especially when contrasted with gold.