These look awesome for larger seed/clone populations, so no more trying to pop one out of an entire flat. Bootstrap Farmer is the brand, and they are a bit expensive ($60 for 5 sets, no 1020 trays or domes) but very high quality. They do also make super strong 1020s and domes, sold separately (of course that makes sense, or cents rather) . Next time I waste money, these likely will be the reason