Six spools of shimmering thread coordinate perfectly with MJ Kinman's December Tanzanite Fat Quarter Set eQuilter product code FAFQBTAN to complete the Birthstone Series pattern eQuilter product code MJPATTNZ. 80/12 needle recommended. 'MJ Kinman Birthstone Series - December Tanzanite' Thread Set, includes six 250 yard spools of 40 wt Sulky Rayon Thread.