Coats 30wt Cotton General Purpose Thread is 100 Extra Long Staple Egyptian Cotton and is Mercerized for luster and strength. Can be used for all purpose sewing on natural fibers. Available in a range of 44 colors. 3 spools per box, 225yds per spool 240 spools per case. Hand Needle Size: 6, 7 or 8. Machine Needle Size: 11, 14, 16 or 18.