Our set of 6 hummingbird feeder stoppers uses a # 3 rubber stopper, with a glass tube and red rubber tip and measure 15/16" at the top x 45/64" at the bottom. These stoppers do not contain a ball bearing. Sold as a set of 6.
Dimensions:
| SKU | Size | millimeter | fraction |
| NB6 | # 3 |
24mm top x 18mm |
15/16" top x 45/64" bottom |
TIP: Always fill your feeder completely full with cool nectar. Insert the stopper and invert quickly to avoid any air entering the feeder. Tube feeders operate on a vacuum principle. Only if the feeder is initially filled completely full will the vacuum form!
Always measure the opening on your feeder before ordering. Every feeder is different. We cannot pay for return shipping. The below photo is for educational purposes only and is not to scale. Please use an actual tape measure or ruler to make this measurement.
Ships in: 1 to 3 days
Ships from: Maryland
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