These 4-1/8"W polypropylene dividers allow you to split up different items within a bin. For use with shelving systems that have bins measuring 4"Hx4-1/8"Wx11-5/8"D (Items 120955, 120961, 121020, 121026 & 121032) or 4"Hx4-1/8"Wx17-7/8"D (Items 120967 & 120981); shelving systems all sold separately. Black color. Sold as a package of 50 dividers. USA made.