Hummingbird Feeder Metal Base with Perch & Tray | Replacement for Many Glass Feeders | By Best Home Products (Silver w/ Red Flowers) Replacement Bottom - Tray & Perch for Best Home Products Feeders and others Inside Dimensions: 1 11/16th" --- Outside Dimensions: 1 7/8th" for screw thread. Wall thickness 1/16th" Overall Dimensions: 6.5" Diameter Leak-proof design deters wasps and bees - 4 feeding ports Feeder Not Included