The Hopper Extension is an easy to install---flat black powder coated 20 gauge steel to fit any of the popular 1500 sq. ft. pellet stove models like the Summers Heat 55SHP10 and 55SHP10L, the Englander 25 PDVC and the Timber Ridge 55-TRP10 found in Home Improvement centers and Hardware stores. We provide you with all of the hardware, gaskets, mounted limit switch bracket (that accepts either the push button or lever style switch), extension wires and the easy to install instructions. It is easy and simple to install. In 20 minutes with the use of a small socket, a 3/16 drill and a pair of pliers, your pellet stove will hold 2 1/2 bags (around 100 lbs.) of pellets.We even included a set of instructions to help the lid issues while lessening the chance of future failure---for free! This improvement will put the final touches to making your stove a much friendlier machine to own and operate. Warning----This product may void your limited warranty!The manufacturer of this Hopper Extension is in no way liable for indirect, incidental or consequential damages in connection with this product including any costs or expense, providing substitute equipment or service during periods of malfunction or non-use. No PO Box shipments! Dimensions: Your stove's present hopper opening will be about 19 5/8 wide by 7 1/2 for this to properly fit. Outside dimensions will be 21 7/8 wide by 9 3/4 deep by 12 7/8 tall. Great Investment for your Pellet Stove while you Save Time and Money! Proudly made in USA for you!