Kare & Kind® offers150pcs Metal Candle Wick Sustainer Tabs. This type of tab keeps the flame from reaching the bottom of your container. These metal wick tabs are durable and are designed for various candles. These metal wick tabs are designed for tabbing your own wicks during the candle making process. The base diameter is 19mm with a neck height of 6mm. Kare & Kind® NOTE:Kare & Kind is a registered trademark with USPTO and is protected by US Trademark law. Please contact us for any reason and we will make sure you are satisfied. This item ships in Kare & Kind® retail packaging. THANKS