<b>About Grateful Gnome</b>:<p>Grateful Gnome, Is The Original Hand Blown Glass Hummingbird Feeder Company On Amazon! Our Brands Are Of Hand-Blown Molded Glass Art . Our Collective Team Is Highly Talented And Have Over 30 Years Of Experience Making Glass<p><b>Measurements</b><br>Diameter 4.13 in/10.5 cm.<p><b>Installation steps</b><br>- Unscrew the base counterclockwise</br><br>- Remove the old sealing ring from the plastic base</br><br>- Install the new sealing ring</br><p>Includes<br>- 3 Rubber Sealing Rings</br><p><b>ATTENTION</b><p>This Product Is The Original Replacement Rubber Seal Gasket Ring For Our Grateful Gnome Hummingbird Feeders. It Is Compatible With All Grateful Gnome Hand-Blown Glass Hummingbird Feeders As well As Our Imitation Competitors Out There.