TOUS Straight ring in silver vermeil with a strip of seven bears measuring 5.5 mm. Sterling silver plated with 18kt gold with a thickness of 3 to 5 microns and with no other metal between them. Production technique: Casting. Quality Certificate: 925 sterling silver plated with 18kt gold. To ensure your TOUS jewelry always sparkles like new, we offer a free cleaning and maintenance service for all our jewelry.