The black n white feeder is material I had. I used the black waste water pipe because the radii are better than white pvc, longer smoother. The cap on the top is screw plug. The cap on the bottom is just a short piece of pipe w/ a cap. i just put tht on when it is raining, when the girls are locked up to keeps pests out and when they have made a mess and I want them to eat it off the ground. I might make a cap for the water also. That way I can cap the water when i move the tractor instead of taking them down.