Builders Best PWM622 Wide Mouth Hood with Bird Guard 4 in.

 ½” x ½” pest grid snaps in and is removable for cleaning

Polypropylene molded plastic
Free swinging back draft flapper
4 mounting holes
11″ fully assembled tailpipe
Aluminum trim plate
Back-draft flapper
Wide mouth plastic hood

Available:
3″ and 4″ diameters
faceplate with ring or flush
* Remove screen if using for dryer venting.