... shock materials 2) self-adhesive tapa is available 3)qick requeste Kraft Paper Bubble Envelope1)made of kraft paper and bubble membrane2)Many colors and designs arr ... parts, medical equipment, watches, pharmaceuticals, glass products, etc.Bubble Specification:Diameter of 5MM, 10MM, 15MM, 22MM, 25MM, 28MM, 30MM. Custom Kraft Paper Bubble Envelope