Aquarium not included laser cut from 1/4 inch cast acrylic - for 30"x12"x12" 20 GAL Long aquarium (water height: 10") - for 36" x 18" x 17" 40 GAL BreederKit (water height: 10") - for 24.25" x 12.5" x 12.75" 29/30 Gal (water height: 11") - for 48.75" x 14" x 21.25" 55 Gal (water height: 13") - for 49" x 19.5" x 21.25" 75 gal (water height: 13") includes: - (3 -Baffles) 2 K1 fluidized plates, bubble trap plate. - Duel 1.00" drain Plates - plate with(2) 4.00 sock holder* (filter are not included) - 2 cut outs from air pump tubing (for the flow required for fluidized media)- 1 pass through cut out for mechanical filtration (between k1 section and the bubble trap plate.) *The plates are uniquely designed so that the sock holder is not required to be silicone to the tank itself. It is directly attached to the drain plate This kit is very easy to assemble; all that is needed is aquarium safe silicone* . The kit allows you to customize your baffle placement for maximum refugium volume. *We recommend GE Silicone for Plastic due to its ability to adhere to both acrylic and glass. It is also 100% reef safe.KEY NOTE: The inside width of the aquariums will vary due to the different brands and manufacturers. This kit was designed for a Aqueon® tanks. The best way to measure the inside with is with calipers, however if calipers are not an option cut a dowel or straight wooden stick until it fits flush with the glass on both sides (make sure the stick is level when it is flush with both sides of the tank).We can build you a kit for any size aquarium such as, 10 gal, 20 gal L, 20 gal H, 29 gal, 40 gal breeder. We can also make custom kits dividers to any specifications. Send a message for a quote or more information.VETERAN OWNEDMADE IN USA