Cut to the Ray-Ban 4026's own spec, this aftermarket set is 130mm long and molded in plastic, shaped for its square front. That 130mm length is shorter than the 140-145mm arms used on most other square plastic RB models, so it's worth confirming against the arm you're replacing rather than assuming any 'RB4000-series' temple will do.

Shorter plastic arms like this one have less material overall to absorb the twisting that happens every time the temple is opened past its resting point, which is part of why the hinge end tends to wear before the tip does. A loose hinge on a short arm is common and usually not a sign of a manufacturing issue — it's just where the stress concentrates. If tightening doesn't hold, the arm is the part to replace, not the front.