Perfecto Manufacturing 22 Inch Undergravel Filter (45/60 Hexagon) Filter is: 11" on the side from corner to next corner, 22" from point to point across center, it is 19" straight across the center from side to side. There is no warranty. This filter is just one plate. Comes with two pieces of 1" rigid tubing, two pieces of 316" tubing, two air diffusers (air stones), two caps, two elbows with built in strainers (fish guard). The filter plate has three holes.