Planet Aquariums Mega Matrix Black Framed 84.5 x 30.5" (270 and 325 Gallon) Lid Lid Style:ReeFlex Fused Air The longer dimension should be

The longer dimension should be considered the length

Built for the Planet Aquariums Studio Column 11

Built for the Ultum Nature Systems (UNS) 75P Standard 36 Gallon

Note that modular lid frames (ReeFlex and ReeFlex Air) cannot have cutouts for overflows at the rear center on 2 lid sets

This polycarbonate lid is made to fit the Red Sea Reefer 425

Planet Aquariums Mega Matrix Black Framed 84.5 x 30.5" (270 and 325 Gallon) Lid Lid Style:ReeFlex Fused Air The longer dimension should beBuilt for the Planet Aquariums Mega Matrix Black Framed 84. 5 x 30. 5" (270 and 325 Gallon), this lid is cut from 3 8" optically clear polycarbonate and screened with 1 4" clear mesh to keep your livestock where they belong without cutting into your light. If you prefer black mesh or 1 8" clear mesh, you can select that when you configure your lid. Every ClearView lid is proudly Made in the USA. Made to order, built to last. Choose your lid style