Bright by Aurifil thread kit of 12 large (1422 yard) spools of 50 Weight 100% cotton Mako thread from Aurifil. Kit includes 12 large spools Cotton thread 50wt 1422 yds. Includes the following colors: 2120, 1104, 2395, 2250, 6737, 2870, 2810, 2740, 2530, 2535, 2545, 2520. Long staple Egyptian cotton is the best in the world! The 50 weight is the finest of the Mako threads and is very smooth and strong. 100% mercerized cotton.