RB3605N keeps to Ray-Ban's common 140mm temple length, using metal arms with an aviator curve set into a plastic front. This aftermarket pair follows that same curve, so it hinges into the front correctly instead of the straighter arm profile built for Ray-Ban's square sunglasses. Because several plastic-front Ray-Ban models share a broadly similar aviator taper, ordering against the 3605N code specifically is what keeps the hinge fit accurate.

When only one arm is bent or missing, there's no need to replace the pair as a set — a matched single arm restores symmetry, since Ray-Ban's aviator-style plastic-front frames use the same arm on both sides at this size. Confirm the model code rather than ordering by shape alone, since several similarly-curved Ray-Ban lines share this general look. Testing that both temples fold to the same angle once fitted is a quick final check before considering the swap done.