3" Round No screen vent, black - bag of 4 Stainless Steel Vents BNS-100 4"4PK

BNS-100 4"4PK

9-1/8" x 4-5/8" Stainless steel vent

RWS-100 4"

They are held in place by #6 screws

3" Round No screen vent, black - bag of 4 Stainless Steel Vents BNS-100 4"4PK3" Round Black No Screen Vent bag of 4 BLNS 100 3"4PK These round vents are made of Aluminum. They are easy to install in wood. Not made for glass or metal or PVC pipe. They fit into the hole made by a drill type hole saw and are held in place by knobs on the side of the vent. No nails or screws are needed. The louvers are closely spaced to prevent wasps or other insects from entering. They do not have screens. Fits into a 3 inch round hole. 1. 822 si