Staples Portable File Tote, Letter Size, Clear (TR58298) | Staples
Amazon.com : Bankers Box Heavy Duty Portable Plastic File Box with Hanging Rails, Letter, 1 Pack (0086304) : Office Products
Sterilite Portable File Box, Plastic, Black - Walmart.com
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Iris Weathertight Portable File Box with Handle | The Container Store
Iris Weathertight Portable File Box with Handle | The Container Store