Fits all non-wire shelves. Part of our Optimal™ shelf divider system. Optimal™ is easy to install and adjust. With the smart back rail, the dividers can be adjusted from the front. There is no need to click the divider at the back, just hook it onto the back-rail and fix it to the front grip. The system includes dividers, pushers, trays and other accessories. It works with all types of shelving and is ambient and cooler-friendly.