The Ray-Ban RX6437 prescription frame pairs a square metal front with 140mm metal arms, and this aftermarket set is built to that same length and straight-edged profile so the hinge seats correctly against the front. All-metal eyeglass frames at this size are common across several Ray-Ban lines, so matching the exact model code matters more than just picking 'square metal, 140mm.'

Square metal eyeglass frames like the 6437 tend to hold their shape well over time, with wear concentrated almost entirely at the hinge screw rather than along the arm. If the temples have started drooping or won't stay open at a consistent angle, that's the screw working loose — a straightforward fix before it's worth replacing the arm. Catching it at the drooping stage, rather than after the screw has stripped completely, usually means a simple tightening is all that's needed.

Frequently asked questions

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 6437, mismatches are rare, but you're covered by a 14-day return window if the 140mm arms don't align with your hinge.

My hinge feels loose — will new arms fix that, or is it the frame that's worn?

A new 140mm arm includes its own hinge barrel, so if the wobble is coming from worn threading on the arm side of the 6437, replacing it usually restores a snug, tight fold.

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

These arms are made specifically for the 6437, matching its 140mm length and Square hinge design, so they attach to your existing screws and hinge without any filing or adjustment needed.

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 6437 is broken or scratched, or buy the pair if both need replacing — either way they match the 140mm length exactly.