This bobbin will fit with all Irish Tension wheels and is ideal for spinning short fibers and fine spinning. The fatcore will simulate a partially filled bobbin making this type of spinning easier.

This 3 speed fat core bobbin is clear lacquered and can be used on the S10, S10DT, S15, S51, S51DT and S75 wheels. The bobbin has a sheave with three settings on one end to obtain three different spinning speeds but also has a core of 50mm (2").

The fat core affects less pull on the yarn for more control on cotton and fine slippery fibers. The ratios are: 1:6.5 / 1:9.5 / 1:15.