... in seal shock absorption, medical equipment, acoustic adjustment, optical display, etc.Efficacious catallyzer: Nickel nanometer has good catalyzing effect, ... non-ferrous metal: Nickel nanoarticle can coat under oxygen-free condition below smelting point of the particles. This ... shrinkage Package: Two-double plastic bag with static-free,packets with 1001000g in a metal box Nano-nickel Particles