Ive been trying to find more info on how common enail coils work, what materials theyre made of, and the safety of them, but I cant really find any information regarding it. The most I found was a description from here (https://www.alibaba.com/product-det...pm=a2700.7724857.main07.12.64181fe5rMIUBD&s=p) "Hot Runner Coil Heaters are made of nickel chrome resistance wire placed inside chrome nickel steel tube filled with MgO powder and compacted for faster and efficient heat transfer. The heaters are annealed to acquire malleability for bending into any shape. Hot runner heaters with built in thermocouple are also available. Hot runner bushes are produced with hot runner heaters of different cross section with inner brass and outer stainless steel cover." Are enail coils generally regarded as safe? I really cant find any discussion regarding them, but they all seem to be made in China with no info on what theyre made of.