FITS ALL SUPER FEEDERS!  This standard clear extension may have a scuff/blemish and is totally fine to use with same warranty.  This extra or replacement clear extension is manufactured out of a polycarbonate material like used for race car windows and other applications.  It comes with two small screws and metal washers. Note: This extension has a very slight difference in transparency tint than very early model ones dating back years.  Early model clear extensions were made out of clear acrylic material like used for aquariums but more brittle than polycarbonate material if stressed and/or exposed for a long time to oily foods.    At check out, be sure to scroll down shipping options.  USPS Mail may be cheapest mode. This type 2-cup capacity clear extension has been supplied as a standard item with all feeders for a long time and will fit just like any prior extensions on all super feeders.  Approximate size of extension:  3 1/2" x 3 1/4" x 3 7/8" high   Note:  Unlike acrylic, they can be modified/drilled out for larger screws or whatever without worry about cracking. 

IMPORTANT NOTE IN REGARDS TO A PAST CUSTOMER REVIEW:  WE DO NOT, NOR HAVE WE EVER CLAIMED THIS ITEM TO BE DISHWASHER SAFE.  The only part we claim as such is the bowl we supply with the cat feeder stand.  This extension can be cleaned with hot soapy water, rinsed with clean water and hand-dried, but it should never be exposed to hot-coil type heat to dry.

For even more super feeder capacity, you may consider the larger 1.5 gallon hopper listed here which will fit perfectly directly to your dispenser or any clear extension.