タイトルまたは説明

1. Red Onion: Red onions are a type of onion known for their deep reddish-purple skin and mild, sweet flavor. They are commonly used in cooking, both raw and cooked, and are popular in salads, sandwiches, salsas, and various other dishes. They are rich in vitamins, minerals, and antioxidants, making them a healthy addition to meals.

2. Double Shell: The term "double shell" could refer to a specific characteristic of the onion, possibly indicating that it has multiple layers of protective skin or that it has a particularly thick or robust outer layer. This could be advantageous for storage and transportation, as it may help protect the onion from damage or spoilage.

3. Size (*5cm): The "*5cm" designation could refer to the size of the onion, possibly indicating its circumference or diameter. A *5cm onion would be relatively large, as onions are typically measured in terms of their diameter. However, it's important to note that this measurement could vary depending on the specific cultivar and growing conditions