Wasps, mud daubers and rodents pose a serious threat to the refrigerator on your RV. They can enter through the refrigerator vents and cause serious damage by building nests that interfere with air flow. Camco 42153 (Model RS700) fits Norcold refrigerator vents that have 27-1/2” long louver openings. These easy to install screens will help ensure that your vents stay free from costly invasion by unwanted pests. Includes (3) screens measuring 27-1/2" x 1-5/16" Includes (3) screens measuring 27-1/2" x 1-5/16" Protects the water heater from flying insect nests Heavy-duty stainless steel mesh cover Easy to install