4 U2K cores, U2K Core 2, U2W core 2, U2K2 only + imported sealing ring 1, U2K Core 2+100 Cotton 7cm, 2 U2K cores + 50 thick cotton 7 cm, 10 active U2K cores, 2 U2K cores + 200 thick cotton 7 cm, 2k core+1 pair of spark covers, 2 U2K cores + 100 carbon cotton, 2 U2K cores + 100 pieces of carbon cotton, Blue plastic headband, 2 carat, 2 U2K cores + 1 gray plastic headband, 2 U2K cores + 1 gray cloth headband, 2 U2K cores + 2 adapters, Activated carbon 2 pieces + 3N11, Activated carbon 2 pieces, 2 pieces of double protection cores for welding dust and poison, 2 pieces of 618 activated carbon filter elements
