Features: Durable Replacement: Our rv window and roof vent knob is designed to replace worn-out or broken knobs, ensuring a secure fit and long-lasting performance for your or motorhome. Easy Installation: The trailer window crank knob features a user-friendly design that allows for quick and hassle-free installation, making it perfect for diy enthusiasts and rv owners alike. Versatile Compatibility: This knob is compatible with various rv window and vent interior hardware, making it an ideal choice for upgrading or replacing hardware in your , rv, or motorhome. Sturdy Plastic Construction: Made from high-quality plastic, our replacement trailer knob is built to withstand the rigors of travel and outdoor conditions, providing reliable functionality on every journey. Smooth Operation: Designed specifically for crank-out windows of rv s, this knob ensures smooth and effortless operation, allowing you to enjoy fresh air and ventilation with ease. Specification: Material: Plastic Diameter: 5.5cm Notes: Please allow slight tolerances in size due to manual measurement, and lighting in photography may result in a difference in color than in real. Include: 4*Knobs with Screw