+OSB is a tubular brass extension tube designed for drain, sink, and tubular plumbing applications. Made from durable 20-gauge brass with a corrosion-resistant chrome-plated finish, this extension tube features threads on both ends, allowing for secure, leak-resistant connections and easy installation when extending or replacing existing drain assemblies. • Durable 20-gauge brass construction. • Chrome-plated finish. • Threaded on both ends. • Compatible with standard 1-1/4in tubular drain systems. • Ideal for extending or replacing sink drain tubing.