How does merging listings happen?
Sellers cannot merge listings. Amazon does that for you. When you provide product data to Amazon, we search for matches to existing information.
If we find a match, we will merge the product data into a single detail page with multiple seller offers. Reducing the number of product detail pages improves the quality of search results and makes it easier for buyers to find the products they want. This improves the customer experience by providing better search results and accurate product comparisons. Customers can then see individual seller listings by clicking the "Used & New" link in the More Buying Choices box.