Review on 🌀 Maurice Franklin 3-Inch Round Plastic Vent - Black - Pack of 4 by Casey Mann

I think this is my 3rd or 4th order. Use the correct diameter hole saw. In my other orders, these vents were used in a rolling case that housed a 100 amp hour battery, solar regulator, inverter, battery insulator, and a few other things for a DIY solar generator. Storage shed with solar panels mounted on the roof and the rest of the solar generator inside the shed. It charges various batteries for garden/lawn maintenance (blower, grass trimmer, lawn mower) and drills. The vents work well to keep the summer heat in the barn at a manageable level. They are easy to install and the black looks great with the barn gray.