Aerodynamic design allows fresh air in anytime...even in the harshest weather! Rain stays out while smoke, stale musty air, cooking and unwanted odors escape. Not recommended for use with high-powered ventilators. Includes installation hardware. Color is White. Impact-resistant! Includes screen. Vent Cover Prevents Heat Build-up. Cynder's insulator fits comfortably in a standard 14" RV vent opening without the need for fasteners. The insulator keeps your RV or Camper cooler in the summer and warmer in the winter with the help of a full 2.75 inch of foam that minimizes heat transfer. The reflective surface prevents sunlight from heating up your RV in the summer.