Sterling Silver .041" Threaded Earring Back - Pack of 6 Master Alloys Apply testing acid (sold separately)

Apply testing acid (sold separately) across the streak

Magnifications 3X

Part # Grit Grade 133

Includes multiple filter pieces in two distinct sizes to address different filtration points within the machine

Sterling Silver .041" Threaded Earring Back - Pack of 6 Master Alloys Apply testing acid (sold separately)Keep earring sets secure with these sterling silver threaded earring backs from WR Cobb. Designed to fit a standard . 041" (1. 04mm) diameter post, these clutch style backs feature a threaded mechanism for a reliable, adjustable hold. With a 5. 75mm outside diameter, they provide a comfortable fit and confident support for a wide range of earring styles. Sold in a pack of 6, they are well suited for bench production, repair work, or retail resale.