Nothings Impossible Flying Pig Glass – Double Tree Percolator Stemless 18mm – This glass pipe from Nothings Impossible Flying Pig Glass is a great piece measuring 12″ tall. It has a stemless 90 degree 18mm joint with two connections both leading to a chamber featuring a Tree percolator. These percolators help cool down your hit making it much smoother. The double percolator just makes it 2x better! The branches on these tree percs are also diffused adding even more benefit. The 90 degree stemless joint makes this piece great for concentrates.