Its a 55 drum on its side with a rectangle cut out with a reciprocating saw. I then braced it between the 2 4x4 posts and marked an area that I would add a 4 inch PVC. Cut that out too. Then positioned it again and screwed it in with lag bolts with a washer. I used 3 on each side to secure it. The PVC piece consists of 2 sections of 4inch PVC about 9-12 inches each. I also used a 45 degree angle angle and the black flashing piece you see. I got it in the PVC area of the local HD
