EUPHONICS 506, 507, 509, 510, 511, 512, 513 Replacement Stylus. Used in Euphonics U-14, U-15, U-16, U-16, U-18, U-19 Series. Diamond/Sapphire flip over. New old stock, generic replacement. Also: N429SD, 2628DS, EU4XSD, AC370D1, PS-79, 610SD. 464-DS77