Unless you have a serious tolerance aim for something less deadly, As someone with a significant tolerance to opiates, and that includes daily fent use, there are analogs out there that still cause me to question everything I get. Ordering from China means you can’t be sure you are ingesting what is on the label, and if it’s in pill form or pre mixed powder it will have hotspots unless homogenized. Dosages with regular fent need to be carefully measured out volumetrically, and the dose that provides effects is extremely close to the one that will kill you. Please think about it,