Before purchasing, please see our video on "How to determine the canopy you need", located in the photos section of this listing!! New Glass Canopy for 20 Gallon Long, 29 Gallon Show & 37 Gallon High Aquariums 30”L x 12”W By Aqueon, Aquarium Masters, Deep Blue & More without a center brace. Contains one 29 inch by 11-3/16 inch glass canopies, Comes with 2 inch wide plastic backstrip that can be cut to accommodate airline tubing, heaters, and other gear. Each canopy comes with a handle and each canopy folds open. Fits Standard 20 Gallon Long, 29 Gallon Show,& 37 Gallon High Aquariums 30”L x 12”W By Aquarium Masters, Deep Blue & More Without A Center Brace. Blue Spotted glass canopies include diamond polished edges, handle, hinge, and backstrip on most standard models