For those of you that are a little less "crafty" when it comes to DIY. They are also available in white from other sources. But your selection will be much smaller. I make mine with a heat gun and a wine bottle, but this will work too: http://www.parts-express.com/cat/speaker-port-tubes/320 I know most of these will be WAY too big for rod holder applications, but look around. they are available down in the inch or inch and a half range. I just put the above source in there as an example.