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LV,

HW Products, Inc. (makers of the pad savers for the WW) now makes 'Brass Saver' products. I've used the trombone, baritone and trumpet set myself, and they recently came out with a set for tuba. They work very well with soft bristles and no exposed wires. Here's a link:

The H.W. Brass-Saverâ„¢ set
http://www.padsaver.com/BrassPage.html

it's not the size of the snake that counts...

LV wrote:I actually have the tuba BrassSaver, but I'd really like to find something a little bigger in diameter to do a better scrubbing. Thanks anyway!

Well, you could always take a bottle brush, cut off the handle and crimp the brush end to a length of bicycle brake cable casing...