APM 531 Bass Clarinet Ligature The American Plating & Manufacturing (APM) 531 Bass Clarinet Ligature delivers reliable performance, clean tone response, and long-lasting durability for bass clarinetists. Crafted in the USA, this traditional two-screw ligature is engineered to secure the reed evenly across the mouthpiece table, ensuring consistent vibration, optimal resonance, and smooth articulation across all registers. Featuring a durable nickel-plated finish, it provides exceptional resistance to tarnish and wear, making it an ideal choice for student musicians, school band programs, and advancing players looking for a dependable replacement or upgrade. Fits most standard hard rubber and plastic bass clarinet mouthpieces seamlessly. Please feel free to reach out to our knowledgeable sales staff with any additional questions!