The 9 x12 inch Poly Mailer Envelope Bag in a 100 count package is a versatile and practical product for business and shipping needs. Made in the United States, this model (PM3-100) offers a reliable and secure option for packaging and mailing items. The poly material provides durability and protection, while the size allows for easy filling and sealing. Whether used for sending documents, products, or other items, these envelopes are essential for efficient and organized shipping processes.