Features
SIZE

54 mm.
Before making your purchase, make sure to check the measurements of your glasses. This model is available in x lens width. All dimensions are listed in millimeters and include lens width, bridge, and temple length.
MATERIAL

Polycarbonate
EASY INSTALLATION

Easy Installation
All our spare parts are designed to fit perfectly with your original model. You can do it yourself at home by following our step-by-step instructions or videos.
Description

Technology and Material
These high-quality spare parts are made from durable TAC and polycarbonate materials—well-known for being lightweight and impact resistant, perfect for everyday use. Featuring built-in UV400 protection, these replacement lenses effectively block harmful ultraviolet rays to keep your eyes safe. The materials provide an excellent balance of clarity, comfort, and long-lasting protection.Compatibility and Fit
Specially engineered for the Ray-Ban model 3931, these compatible lenses match the exact shape (oval), dimensions (height 42 mm, diameter 54 mm), and base curve (6) of the original design. The result is a precise, secure fit you can achieve with an easy DIY installation—no compromise on stability or appearance.- Significant savings compared to original lenses
- UV400 protection for your eyes
- Tailored fit for Ray-Ban 3931
- Easy self-installation at home
- Practical solution to extend the lifespan of your sunglasses
Tutorial
How to change the lenses on your glasses?
- Prepare your glasses: Wash your hands and place the glasses on a clean, soft surface to avoid scratches.
- Loosen the frame screw: Use a precision screwdriver to carefully loosen the screw holding the lens. Keep the screw in a safe place to avoid losing it.
- Remove the old lenses: Once the screw is loosened, gently slide out the lens, avoiding excessive force to prevent damaging the frame.
- Align the new lenses: Ensure the new lenses match the curvature and shape of the frame.
- Insert the new lenses: Carefully place the lens into the frame and reinsert the screw, tightening it gently to secure the lens without over-tightening.
- Check and clean: Ensure the lenses are properly fitted and clean the surface with a microfiber cloth.
It’s that easy! Enjoy your refreshed glasses with new lenses.
Be Eco-Friendly

Commitment to Quality and the Environment
At Replacementlenses.net, our commitment to both quality and the environment is at the core of our mission.
We understand the importance of sustainability in today’s world, which is why we offer replacement parts for your glasses. Our goal is to help you extend the life of your favorite eyewear, reducing waste and the need for new purchases.
By choosing our products, you not only save money but also contribute to a more sustainable future. We believe that every small effort counts and that together we can make a big difference in protecting our planet.
Additional information
| Weight | 20 g |
|---|---|
| Dimensions | 20 × 10 × 1 cm |
| Size | 54 |
| Ray-Ban Model | |
| Front Material | Metal |
| Temples Material | Metal |
| Lens material | Polycarbonate |
| Shape | Oval |
| Height (mm) | 54 |
| Lens curvature | Base 6 |
| Use | Sun |
| Product Type | Compatible |
| Audience | Adult |




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