Material:Iron, bakelite, permanent magnetic iron.

Pack:Each time single with bubble hull and insert a card packing, 10 is one locket, 2 lockets is 1 box.

Lowest order:1 box(less than 4 boxes invite complacent freightage)

Hand over a period:35 days

Use:Magnetism corn rules, the in common use concert electric welding work uses.