Aurifil Medium Butter MK50 2130 Cotton Mako 50wt Thread Large Spool 1421 yard Cotton Mako 50wt Medium Butter collection from Aurifil 1 Large 50 weight spool thread; 1422 yards (1300 meters) each 100% Mercerized Long Staple Egyptian Cotton Premium quilt shop quality thread Neatly spooled and shrink-wrapped by the manufacturer