http://btcmixer2e3pkn64eb5m65un5nypat4mje27er4ymltzshkmujmxlmyd.onion/help/trade/mix
You could of course, in reality, send a different amount to a Mixer
Deposit Address than what you planned to do on screen, which doesn't
matter, the screen will automatically update the other Mixer Deposits
for you with new expected amounts based on whatever you send.