TimberTech RadianceRail Round Aluminum Balusters are one of the choices of infill for the RadianceRail Top and Bottom Custom Rail Pack. Smooth lines. No visible hardware. Both add to the high-end look of RadianceRail composite railing, TimberTech’s most sought-after railing product. Homeowners can mix and match differing post and rail colors, curve the rail and add a deck lighting system for a truly upscale look that reflects their unique styles.