What each code means
In an inscription such as RB4378 6477 ···□·· 145 you'll find these five details:
Refresh your Ray-Ban RB4378 glasses with a pair of original arms, with the finish matching the selected color.
The RB4378 uses original Plastic arms with the Ray-Ban logo. Before you buy, check the model, color code and length on the inside inscription.
Read the inscription on the inside of your own frame to correctly identify each code.
In an inscription such as RB4378 6477 ···□·· 145 you'll find these five details:
Follow the visual guide and make the swap step by step.
That's why we show you how to check the model, color and length, list what's included in the pair and clearly state that screws are not included.
ReplacementLenses has been a certified EssilorLuxottica distributor since 2018.
Right and left Ray-Ban arm with original logo.
Clear check of the color code and the 145 mm length.
Coverage against manufacturing defects and specialist support.
Discover the elegance and distinction that Ray-Ban 4378 Replacement Arms-Temples bring to your eyewear collection. These arms are the perfect ally for those seeking a combination of style and comfort in their daily life. At 145 mm in length, they fit most facial shapes, ensuring a personalized and comfortable fit.
The square design of the frames enhances an intellectual and sophisticated look. This style is particularly chosen for those with bold personalities who aren’t afraid to express who they are and what they stand for. Additionally, the injected material of the frame front ensures unmatched robustness, providing long-lasting durability.
What sets the Ray-Ban 4378 Replacement Arms-Temples apart is the injected material they are made from. This material provides lightness and resistance, guaranteeing all-day comfort regardless of your activities. Their resilience ensures a prolonged lifespan, offering excellent value for money.
Original Ray-Ban arms are available in a wide range of colors, allowing you to select the shade that most closely matches your style and personality. Colors for the front include 601 – BLACK for a classic, serious look; 6477 – TRANSPARENT for a subtle and delicate style; 6572 – TRANSPARENT GREY for a contemporary touch; 6602 – TRANSPARENT BROWN for retro fashion lovers; and 710 – HAVANA for those seeking sophisticated elegance.
Whatever your style, the Ray-Ban 4378 Replacement Arms-Temples will allow you to express it through your eyewear choice. You’ll not only be investing in high-quality arms, but you’ll also be enhancing your image and highlighting your facial features.
Each pair of Ray-Ban 4378 Replacement Arms-Temples is an affirmation of your taste for the fine, the elegant, and the durable. Don’t wait any longer to add these arms to your collection. You’re guaranteed to receive compliments wherever you go!

Ratings posted by customers for the Ray-Ban RB4378. We show the most recent ones.
“The product is firmly packed.”
Published review“Good quality.”
Published review“Good service.”
Published reviewThe price is for a complete pair: original Ray-Ban right and left arms.
The length usually appears at the end of the inscription on the inside of the arm. Select the same measurement shown on your current frame.
No. Screws are offered as an optional add-on because many frames allow you to reuse the existing ones.
Original replacement arms may use a different manufacturing number, even though their shape, size, color and compatibility match the RB4378.
You can, but we recommend selecting the frame's color code to keep a uniform finish.
Your review of Ray-Ban RB4378