iPower 2-Pack 48" x 20" Durable Waterproof Seedling Heat Mat Warm Hydroponic Plant Germination Starting Pad

This thing heats up well, alright! It heats up too much, though. It has literally cooked several cuttings I had in a prop box sitting on this heating mat. I now have it on a timer so it goes on for 30 min, and off for 30 min and that seems to work ok. I would definitely look for something with better heat control if using for propagation.