This link is just an example. Also, if you've never used one the cleaning rod made to go down the barrel is usually made from brass and is pretty stiff. But the great thing is you can shorten or lengthen them to fit your application! The metal brush I would think would be safe for ribbed tubing because its made for a rifle barrel and its used to avoid damage to the rifling. For soft straight tube the cloth would work too. A patch can be placed around the brass bristled too to avoi damage.
Easy and great idea for tube cleaning! Let me know what ya think
I fill my utility sink with a water/bleach solution then put whatever I want cleaned in the sink along with a small pump to agitate the solution. For tubes, I just put one end on the pump and the other end in the sink and let the solution circulate through the tubes. Works great.
To rinse let the solution out, refill with water and a little Prime and repeat.