Super Bobs are prewound bobbins that are wound with MasterPiece Egyptian-grown extra-long staple cotton thread. MasterPiece bobbins create precise stitches, have very little lint, and lasts longer due to precision winding. These bobbins hold 30-60% more than a self-wound bobbin.
Pkg contains 12 – Class 15 prewound bobbins, 80 yards each bobbin. From Superior Threads.