For anyone living in Switzerland, rooem. is the best and most reliable source for blackened pipes and fittings that I was able to find. Compared to pieces from other companies that I have tried, the ones from rooem. make the tightest, most stable fits without permanently locking. As I was making a custom build, the precision of the pieces was greatly appreciated and fit perfectly to my design. In one of my orders some non-essential pieces were missing, but I didn't take off a star because the customer service team responded within a day and the parts were shipped with no fuss. I will definitely be returning for any future products!