#50/3-ply Cotton thread - 600 yd. spool. Set of 4 Light Neutral colors (#151, 152, 153, 156) x 1 spool each. MasterPiece is nature's finest thread, made from extra-long staple Egyptian-grown cotton and has been designed for piecing, applique, and detail quilting. Get perfect seams with MasterPiece cotton thread.