L Style Bobbins #174 Indigo. 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. 12 Bobbins in package. L-Style Prewound Bobbins 70 yds x 1 dozen. Wound with MasterPiece 50 wt. 2-ply Egyptian grown extra long staple cotton thread. Super Bobs MasterPiece Cotton 70yd Prewound Bobbins 12ct L-Style Indigo. L Style Bobbins #174 Indigo. 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. 12 Bobbins in package. L-Style Prewound Bobbins 70 yds x 1 dozen. Wound with MasterPiece 50 wt. 2-ply Egyptian grown extra long staple cotton thread. CHK-149-12-174