Plastic poly button envelopes are JAM's most popular product. With a durable button and string closure, these envelopes are guaranteed to keep your contents safe. The 1-inch expansion allows for a superior max capacity. They are scratch-resistant and water-resistant as well. Available in 50 colors and 13 sizes, these plastic envelopes are great for color coordinating!
Note, all poly string and button envelopes have 1 inch expansion, except the binder envelopes with pockets, which do not have any expansion.
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