It's an alternative to the Fischers Bee-Quick and is supposed to be, like BQ, more pleasant than the smelly versions. It's an HT Krantz brand. I bought some along with a fume board, scratcher and honey gates in anticipation of harvesting soon. I got a good deal on an extractor from HTK, so I'm paying it forward a bit and trying some of their other offerings. They appear to be good folks to deal with.