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Filter products based on categories (e.g., Stamps, Shipping Supplies, Gifts, and more).
Filter products based on envelope type (e.g., standard, postcard, international, etc.).
Standard Envelope (33)
Priority Mail (10)
Priority Mail Express (5)
Non-Machineable for Square Envelopes
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The Popover plugin is similar to tooltips; it is a pop-up box that appears when the user clicks on an element. The difference is that the popover can contain much more content..