They used to have a very thin bore, ie. less than 1/8 inch. Ideal for laying super thin beads. Go twice where you need more. If you don't already know, bead size and consistency is the subtle art of sealing well. For some reason I just reordered and the hole was about 1/4 inch - essentially the same as what you get when you snip off the tip of a fresh tube with scissors or a knife. So they don't really make any sense anymore as there are better "save sealant" options for capping. If I can't get them with an ultra-thin, uniform aperture, it's useless.
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