This Ultimate Support Ulti-Boom fixed length mic boom arms features a heavy-duty, die-cast counterweight, ergonomic adjustment knobs that feel great in your hands, and lightweight (yet durable) anodized aluminum tubing with internal glides that ensure fast, smooth, noise-free adjustment. Ergonomic Adjustment Knobs Heavy-duty Counterweight Aluminum Tubing with Architectural Anodized Finish 80% Field Serviceable Parts Boom Length: 34.3″ (870 mm) Weight: 1.75 lbs.