The Stonfo Thin Tubed Boddin Thread will make threading fine tubed bobbins easy as pie.
Don't damage your fine tubed bobbins with just and threader. The team at Stonfo has created a bobbin threader to match the slimmer diameter bobbins available today.
If you are tying with small diameter threads and thin tubed bobbins give the Stonfo Thin Tubed Bobbin Threader a shot. The image depicts two bobbin threaders, you only get one with this listing and it's the one on the left side of the image. The thinner one.