Glass Shelf Support Bar
https://www.allendesigners.com/produc...
For use with the 12" x 48" tempered glass shelving. Prevents separation of shelf brackets, and dangerous sagging and breakage. Mount a single support bar between two shelf brackets underneath shelf for maximum strength. Notched at the ends to fit our standard shelf brackets when they are spaced exactly 48" apart. Use with our chrome shelf clips (sold separately) to support 48" glass shelving. Chrome finish.