We have discontinued selling thread burners. We have tried every way possible to sell thread burners and find the happy medium between a high-performance tool and the inexpensive, disposable thread cauterizers available to the beading and crafting community. We go so far as to test each one before they leave our studio and we have still taken back more than 100 every year since carrying them. We've just decided this is a "tool" that is too temperamental for our generous return policy; when we factor in the cost of return shipping and sending you out a new one, we are not breaking even. We will continue to carry the replacement tips for both the Ultra and the Thread Zap II. We recommend going to your local crafts store or googling Ultra Thread Zap....that's what we're going to do when we need another one!