Pallo 7mm Steam Wand Brush "Steamy Wanda"

7mm Diameter Steam Wand Brush Head for small diameter steam wand pipes around 6mm in diameter, but will fit even smaller home espresso machine steam wands as well.

Commercial espresso machine steam wands come is two sizes basically and will be either 6mm diameter or 8 mm diameter. As the bristles flex and should be tight against the steam wand walls get the brush you know will fit tight.
Love Handles?

If you've ever used a twisted wire brush to clean the insides of your steam wands, then you know that it can sometimes be a bit troublesome to get a good grip for proper leverage. Aside from being uncomfortable, that twisty little finger loop doesn't really work that well.
"Introducing Steamy Wanda, a brand new offering from Pallo, the makers of Coffeetool. With it's comfortable ergonomic "love handle" you'll be amazed at how much easier and more comfortable it is to use. And, unlike other twisted wire brushes, The sharp CUT end of the wire is molded into the handle leaving the non-scratching looped end exposed. Perfect for cleaning your portafilter spouts, sight glass crystals and other small areas.

Comes in 7mm and 9mm diameter sizes to fit most commercial and home espresso machine steam wands.