If you want to replace the dome of your camper porthole, it's essential to identify your specific porthole model to purchase the correct replacement part. Here are some steps to help you choose:

Identify the porthole model : Check your RV documentation or inspect the porthole itself to find any labels or markings indicating the manufacturer and model.

Measure the size of your porthole : Standard porthole sizes include 28x28 cm, 40x40 cm, 50x50 cm, 700x500 mm, and 900x600 mm, among others. Measure your opening carefully to ensure you purchase the correct size dome.

Choose the material and color : Domes can be clear or opaque and available in various colors. Make sure to choose one that aesthetically matches your camper and your needs.