CRL Polished Aluminum Finish Rollertrack Bottom Track 2 m Length, 21 mm Wide, 18 mm High 16780 Designed for 1/4&quot; (6 mm) Tempered Glass Perfect for Showcases and Display Cabinets Polished Aluminum Finish Simple &#39;Lift and Drop&#39; Glass Installation Smooth Operating Nylon Rollers are Built Into the Lower Track