there are different colors tapes on bck,including red,white,blue and so on Type: Paste type and cards hook type. Weight: 5g, 10g, 14g, 7g. There are different colors tapes on back, including red, white, blue, 3M tape from America, NoRTON. Surface treatment: Zinc-plated, Epoxy coated. Package: 50PCS/contain.