Amsterdam Popper pack combo 10ml & 30ml Alkyl & Isobutyl Nitrite Solvent Cleaners from Poppers Los Angeles comes from this free-spirited city in the Netherlands where cleaning is a real pleasure. That's because they know how to have a good time there and the rules seems to fly out the window. They can be very naughty with their cleaning, but they always get the job done to perfection. They know how to give a deep cleaning to what they set out to clean and they know how to do it fast and hard. Yet, they have a certain smoothness to their cleaning that rivals any other city. Use only as directed by following the instructions on the bottle.