The Blaze Hexagonal RB3579N combines a plastic front with 140mm metal arms, and this aftermarket set matches that length and material pairing so the arm meets the plastic hinge the same way the factory temple did. Hexagonal fronts have more angles than a standard square or round shape, which makes precise arm alignment more important than on simpler geometries, since even a small mismatch at the hinge throws off how the arm sits against the angled edge.

Because a hexagonal front doesn't have a single dominant curve, the hinge takes stress from several directions rather than one, so it's worth checking that both arms open and close smoothly rather than assuming a stiff hinge will loosen up on its own. A hinge that's tight on one side and loose on the other usually needs the screw adjusted, not the arm replaced. Testing the fold action a few times after fitting is the simplest way to catch an uneven hinge early.

Frequently asked questions

Are these official Ray-Ban replacement parts?

These are compatible aftermarket arms, independently produced to match the 3579's hinge and 140mm length. They aren't manufactured or supplied by Ray-Ban, just built to the same measurements so they attach correctly.

What material are the arms made from, and will the color match my frame?

The arms are molded in an acetate or metal finish that matches the Irregular style of the 3579 closely, though very slight shade variation is possible since they're independently produced as separate aftermarket parts rather than cut from the same batch as the frame.

Can I replace just one arm, or do I have to buy both?

You can order a single side if only one arm on your 3579 is broken or scratched, or buy the pair if both need replacing — either way they match the 140mm length exactly.

How do I know these arms will fit my Ray-Ban frame?

These arms are made specifically for the 3579, matching its 140mm length and Irregular hinge design, so they attach to your existing screws and hinge without any filing or adjustment needed.