I am looking for a source to purchase some small diameter flexible metal conduit and not having much success. If any of you are familiar with DROs, typically on metal working machines, you know what I'm talking about. This conduit is usually around 5mm ID and 7mm OD and is very smooth on the outside as opposed to the larger aluminum conduit sold in the electrical section of the box stores. If anyone knows of a source I'd appreciate hearing about it.