Each threaded insert set consists of one male, and one female thread. These inserts sets are used to make anything you would like with a secured lid such as canisters, lidded boxes, and urns etc…
The inside measurement for the 1.5″ ring is 1″ with an overall height of 1/2″
The inside measurement for the 2.5″ ring is 2″ with an overall height of 1/2″
The inside measurement for the 3.5″ ring is 3″ with an overall height of 5/8″
Niles Bottle Stoppers
https://nilesbottlestoppers.com/product/threaded-inserts-for-urns/
