The Mailbox Ball Signal is a very simple, yet ingenious, design. As the mailbox door is opened, it hits the ball and the ball pops up. After I retrieve the mail for the day, I place the ball back down into it's holder slot.
We have had the mailbox ball for many years now and I don't believe I have ever had a false signal, therefore, based on our experience, wind or weather will not make it flip up. Only the mailbox door opening will actually displace the ball from the holder.
Mailbox Ball Mail Signal Installation and Information
Miles Kimball AVM-01 Automatic Visual Mail Signal Installing the mailbox ball is easy. You simply bolt it onto the existing mailbox door handle, using the hardware included in the package.
You can also see in the image on the right how the ball is set into the holding slot.
The ball is a bright yellow and is easily visible from our front windows. Now, I can comfortably check whether the mail has arrived from inside my home. No more wasted trips to the mailbox.
One Important Note: You do need a standard mailbox that has the dual latches, one on the top of the mailbox and one on the door. You can easily see the latch on the mailbox in the color image above.
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