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Ships within 48 hours · Estimated delivery Sep 5 - Sep 10
533 Control Box
Service: Factory service is performed by Badeco at 8 rue de la Coulouvrenière
Operating at either 1800 RPM (low) or 3600 RPM (high)
Use only accessories rated for at least 40
Successful plating requires proper cleaning
Premium Gold Test Stone-Made in the USA 3" x 1-5/8" x 1/4" WR Cobb 533 Control BoxA professional grade gold testing stone made in the USA from natural Arkansas black novaculite, quarried and cut domestically. Used by jewelers and metalsmiths to test precious metals, this stonealso known as a streak stone or touchstoneprovides a reliable surface for acid based karat testing. Beware of cheap imitations made of glass, which stain and degrade quickly under repeated use. To test a metal item, rub or scratch it across the stone's
