DK Telescopic slides for component shelf, 50 kg, For D: 700 mm, Component Shelves & Rails, Carbon steel, Zinc-plated, 73269098, 2 pc(s), 5.661 lbs, 4028177221451, To retro-fit fixed component shelves for full withdrawal by replacing the existing fastening bolts or mounting rails (heavy-duty version) with telescopic slides.