Fisherbrand Cryo/Freezer Boxes 5.75 x 5.75 x 4 7/8 in.; Without dividers: Boxes, | Fisher Scientific
Amazon.com: Case Compatible with Fisher-Price for Little People Collector Figures, Toy Storage Organizer Holder for Disney Frozen for Elsa & Friends/ for Office Figure/ for Golden Girls Characters (Box Only) : Toys
Den boxes provide nesting sites for fishers | Natural Resources Research Institute
Researchers deploy den boxes as possible tool to aid mysterious fishers
Northern Minnesota experiment attracted some fishers — and other critters, too - Duluth News Tribune | News, weather, and sports from Duluth, Minnesota