RX4340V shares its 150mm acetate arm and square front with the sunglass-only RB4340 Wayfarer, the 'Ease' and 'V' in the name marking the optical, adjusted-fit edition rather than a different build. This aftermarket pair follows the same 150mm, square-front spec either version uses. That figure is worth confirming against your current arm rather than assumed from the frame's general Wayfarer-family resemblance.

As with any acetate arm, slight colour variation between an old, UV-faded temple and a fresh replacement is expected and not a defect — acetate is a natural, layered material rather than a single uniform pigment. The more consequential failure is at the hinge end, where the embedded metal barrel eventually loosens from repeated folding. That's the point to check before deciding the arm, rather than just the hinge screw, needs replacing.

Frequently asked questions

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 4340 is broken or scratched, or buy the pair if both need replacing — either way they match the 150mm length exactly.

Is it worth buying new arms instead of a whole new frame?

Replacing both arms on the 4340 costs from €26.95 with free worldwide shipping, far less than a new frame, and it's backed by a 3-year warranty against manufacturing defects on the 150mm hardware itself.

What if the arms arrive and the hinge doesn't line up with my frame?

Because each pair is listed against a specific model, in this case the 4340, mismatches are rare, but you're covered by a 14-day return window if the 150mm arms don't align with your hinge.

Are these official Ray-Ban replacement parts?

These are compatible aftermarket arms, independently produced to match the 4340's hinge and 150mm length. They aren't manufactured or supplied by Ray-Ban, just built to the same measurements so they attach correctly.