Slimline storage box is perfect for all of your threads. Beautifully organizes up to 104-small sulky snap-end spools. Use free-standing partially opened near your machine or fully opened and hung on a wall. Empty storage box is lightweight (only 4-pounds when filled), made of translucent plastic with a convenient carry handle. All spools are clearly visible and easily accessible, remove a spool with the exclusive lifting tab-spools will not fall out. Pre-printed marking strips are available free from sulky of america. An order form is included with each sulky Slimline storage box. Size-13-height by 13-width by 2-diameter when closed.