Premium plastic comb binding spines for use with Fellowes or any standard 19-ring comb-binding system. Fellowes Plastic comb binding spines in white color have 5/16 diameter and provide a custom look to your reports as well as documents. Spines have a capacity to hold 40 sheets with its 19-ring comb binding system sold as 100 per pack. • 40-sheet capacity. • Plastic binding combs. • 5/16 diameter. • Gives a professional appearance to bound documents. • Use with Fellowes or any standard 19-ring comb-binding system. • Match your covers for a custom look. • Sold as 100/Pack.