There are no internal brass parts that the cleaner can come into contact with. The only issue I've had is where a drop of it landed on to my Cheddar Classics leather snooker cue case. Now that mark won't come off!

I think mine must be a different brand. See photo of instructions below:Dennis King wrote:I have an Angram and use purple line cleaner, from Makro. Just look at the container the only thing it says to avoid is alluminum and nylon. It contains Sodium Hydroxide.
I agree with you John.johnmac wrote:Be careful with this stuff folks. If you have your hands in the sollution for a fairly short time, you'll find your skin is affected. It would not be good to get it in your eyes. It just disolves whatever organic matter it comes into contact with, even at 1:200 dillution.