PackagingSuppliesByMail 100 14.5" X 19" White Poly Mailer Envelopes Shipping Mailing Bags 2 Mil Thick 100 Pcs Adhesive: Synthetic rubber  Hotmelt,  minimum +/- 1/8. Lip Size: 1.5 +/-  & Paper Liner: Clear with antistat. Opacity: Business card inside the mailer should not be visible under UV light. White/Grey Exterior, Black Interior (Interior color of mailer is subject to change). 2-millimeter thickness (+/- 5%) & it is used to Ship Lighter Weight items.