Product review (5 stars): Best roof cap for installing a dryer vent or bathroom vent that exhausts to the roof
Product is made to last and is easy to install.  It is painted black and has a low profile so that it not noticable when installed on your roof.  The damper works well and opens and closes without binding.  You will need a drill with drill bit, roofing knife for cutting shingles, a 4.25" hole saw or reciprocating saw, a hammer, roofing nails, and roofing tar to install.  If you are uncomfortable with heights or you do not have the proper ladder, leave this job for the professionals.