40BR Dual 7" Sock Filter Holder With 2.0" Inlet Bulkheads. Fits 40 Breeder Aquariums - Add Sock Filters to Any Tank - DIY Sock Filter Kit for LARGE SUMP! For Freshwater and Saltwater Use Pre-installed 2.0" bulkheads for increased flow (1 for each sock) Comes with two 7" 200 micron filter socks Easy to install into 40 Breeder or other wide aquarium/sump Custom Built the Day You Order by Artisan Acrylic Fabricator Does not include aquarium