packing list envelopes are sold in a variety of sizes and made with an extra strong adhesive to ensure it will bond securely to shipping boxes,mailing tubes,shipping envelopes, and more. These self-adhesive packing list envelopes are designed to stay securely in place while withstanding the normal wear and tear of shipping. Offered pre-printed with Packing List Enclosed, Invoice Enclosed, Clear, and more specialty applications. we can supply 1.2-5mil thickness LDPE and CPP,released paper used 45gsm -150gsm,supply oil glue,water based glue,hotmelt glue based your request.
https://www.bestenpack.com/packing-list-envelope/