Check the listing for details. Percolator Top Knobs Clear Glass USA Made Set of 2 Sizes Small and Large. Color: Clear, Condition: New. Listed at 13.98 USD. Glass Percolator Tops: Guaranteed to Fit! No more measuring or guessing whether you have the right size. We now include two sizes of percolator tops in each set, so you're guaranteed to get one that fits and works with your percolator. Set of 2 - includes one small and one large percolator top. Fits a wide range of models and holds positively. Cannot fall out. Patented. USA made. Small Top - Fits percolators with 13/16" to 1-1/2" holes. 1"H x 1-3/4"OD. Large Top - Fits percolators with 1-1/2" to 2-1/2" holes, including enamel-ware and most other old style non-electric models. 1-1/4"H x 2-1/4"OD. Visit Our Store Contact Us Glass Percolator Tops Set of 2 Glass Percolator Tops: Guaranteed to Fit! No more measuring or guessing whether you have the right size. We now include two sizes of percolator tops in each set, so you're guaranteed to get one that fits and works with your percolator. Set of 2 - includes one small and one large percolator top Fits a wide range of models and holds positively Cannot fall out Patented USA made Small Top - Fits percolators with 13/16" to 1-1/2" holes. 1"H x 1-3/4"OD. Large Top - Fits percolators with 1-1/2" to 2-1/2" holes, including enamel-ware and most other old style non-electric models. 1-1/4"H x 2-1/4"OD.