Sort, collate, organize papers with ease. Durable, flexible material has unique friction ridges. Increase hand performance and reduce muscle stress. Latex- and PVC-free. Breathable, sweat-free and comfortable for long-term use. Open top works well with long fingernails. Includes two each of Size 3 (X-Small), three each of Size 5 (Small), three each of Size 7 (Medium) and two each of Size 9 (Large). Material(s): Thermoplastic Elastomers(TPE); Size Group: Assorted; Open End Inside Diameter: 9/16; 5/8"; 11/16"; 3/4"; Color(s): Assorted."