... bubble envelope is made of poly outside and bubble liner inside, and Adhesive or Velcro Closure., which has the toughness and ... UsageBe used in post office, logistics, craft glasswork, tape, CD, camera lens, film, certificate, IC card ,mini-type machine accessory, books, toy ... -0#6"x9"+1.57"YS-1#7.25"x11"+1.57"YS-2#8.5"x11"+1.57" YS-3#8.5"x13.5"+1.57"YS-4 ...