Myard 29 Inches Grooved Classic Hollow round Aluminum Deck Balusters for Deck Railing Porch (25-Pack, Matte Black)Unique Grooved Surface. ALUMINUM BALUSTER: Universal aluminum balusters provide a clean, stable and contemporary feel to your deck. Lightweight and never rust alternative to wrought iron. SPECIFICATIONS: Grooved. Pack of 50. Length: 26"; Outer Diameter 3 4". WEATHER RESISTANCE: Powder coated with AAMA 2604 compliant material, five times of the outdoor exposure and twice the humidity exposure than AAMA 2603. Color: Matte Black. Compatible with wood,