Three.0 I like Helzberg's, but I do not like that they don't warranty their products for virtually any length of time unless you shell out extra for the lifetime warranty. I bought my granddaughter an "H" necklace & a lot less than three months later on, the chain clasp broke. https://blockchaintips62603.tokka-blog.com/32032837/a-review-of-cuban-link-necklaces