The original universal size replacement percolator tops. This set includes a clear, heat-resistant glass perk top plus a patented locking ring in non-corroding aluminum, which will fit most electric and non-electric percolators with cover openings from 13/16 inch to 1-1/2 inch. The Fitz-All percolator top fits tight--it won't fall out! A perfect replacement for older perks where the original glass knob won't fit because the hole is worn or enlarged. Get the old, classic coffee pot back in service! TOPS has been a recognized brand in coffee and tea accessories for over 50 years. As a recent addition to the Fox Run family of brands, Tops will continue to meet the needs of the coffee and tea lover with a wide range of dependable products and replacement parts.