Choose from Starter Packages and Complete Collections of pre-filled Original and Universal Slimline Thread Storage Boxes. Each Original Slimline Thread Storage Box holds up to 104 small spools, yet weighs only 4 lb. when filled! EAch Universal Slimline Thread Storage Box holds up to 64 Large and Small spools, yet weighs only 6 lb. when filled! Each spool has its own exclusive, patented lifting tab. All spools are clearly visible and easily accessible, and they won't fall out! Full Thread Collections are organized and labeled by color families. Save BIG over buying these products separately!