Honbay 6PCS Tobacco Pipe Cleaning Tool Cork Pipe Knockers with Adhesive Bottom for Outdoor and Indoors Ash Tray

Works perfect to turn all of my cigar ashtrays into pipe ashtrays. The adhesive is strong enough to hold but can easily be removed once the cork wears down.

I cleaned my ashtray really well, dried it really well, placed one of these in it and it hasn't budged through all the knocking and emptying. Great value for a great product.

I have had the same knocker stuck to my outside pipe dish (homamde ashtray) since I ordered them quite some time ago. Holds up well in damp weather.

Good product, strong adhesive. I used a black magic marker to color the cork to better fit the design of my ashtray.

I use these in a large silicone cigar ashtray to have a knocker for my tobacco pipes. I bought the 6 pack thinking that these would probably not adhere well and come loose quickly. We'll, I'm still on the first one and the ashtray has been soaked in rain, frozen, full of snow, and subject to high temps and humidity and it's just as good as new. These are great quality, stick well, and hold up to weather and 100s of knocks. Highly recommend these.