Seria Umbrella Handle Holder - Allows hands-free use Compatible handle size: Approximately 17-21mm in diameter For rainy days when you have a lot of luggage Easy to attach! I finally found this item, which was in short supply, and purchased it, but the size didn't fit, so I'm selling it. I opened it once and immediately put it back. I will ship it directly in an envelope via Yu-Packet Post Mini.