Ikelite Underwater Housing for Nikon D-3100 Digital SLR Camera
Nikon D3100 Underwater Housing for Mirrorless by Ewa-Marine with Lens with thread up to 72mm Lens Port
DICAPAC UNDERWATER WATERPROOF HOUSING CASE for NIKON D200 D300 D3100 D5100 D8000 | eBay
Underwater housing for Nikon D3100 (body)
DSLR Camera Bag Waterproof Handbag Case For Canon For Nikon D3100 D3200 D3300 D5200 D5100 D7000 D7100 D7200 D200 D300 D500 D600|Camera/Video Bags| - AliExpress
Nikon D3100 Underwater Housing for Mirrorless by Ewa-Marine with Lens with thread up to 82mm Lens Port