Unlock the ultimate venting solution with a Montigo 4 Inch Inner Diameter Support Plate and Ring. This dynamic duo integrates with specific Montigo venting systems, providing unparalleled support and stability. Its 4-inch inner diameter ensures a perfect fit, while the generous 7-inch outer diameter offers ample surface area for secure mounting. This support plate and ring combination is crafted from durable materials and withstands the test of time, ensuring a worry-free ventilation experience for a long, long time.