I looked all over Dallas for a backstrip and none of the aquarium stores had them in stock. I took a chance on this one and it is perfect. It was easy to cut and fits my aquarium perfectly. The size was enough to make two backstrips. I highly recommend this product.
Bad product 7/20/2012
I had to repair the backstrip of my glass canopy so I ordered this (and the hinge) instead of a replacement canopy. What a lousy product. It was as if it was designed for a 1/16th inch thick glass canopy instead of the reported 1/8th inch. I tried heating in very hot water to help open the insert for the glass to no avail. I finally had to insert scissors and twist to stretch (and also damage) the canal that should fit around the thickness of the glass. It took about two hours of finger-tiring work to get it installed. Maybe it just needied instructions (there were none) but I can't imagine any other tricks I could have used to insert it. I finally did get it on so I gave it a 2 instead of 1