These aluminum stair balusters are designed to provide durable, rust-resistant support for stair, porch, patio, and deck railing applications. The 101-piece set features round matte black balusters made from aluminum tubing for a clean, modern look. Their waterproof, corrosion-resistant construction makes them suitable for both indoor and outdoor use. Rail caps and screws are included to help simplify installation and create a secure fit. The hollow round-tube design offers dependable strength while maintaining a sleek appearance.