A Surprise Combustible Envelope Card, Which Can Be Used To Put Rings Or DIY Various Small Gifts, Materials Include: A Hollow Envelope, 2 Pieces Of Incendiary Paper, A Number Of Double-Sided Tape, Two Cardboard Cards (Excluding Matches, Matches Are Provided By Yourself), Birthday Cards For Families, Couples, Parents, And Perfect Surprise Gifts (Random Gold/Red Envelopes)