Sheave: Steel Or Aluminum. Steel Comes In Black; Aluminum Comes In Red. The CMI 2" Service Line Pulley Bush Al is designed for those who seek efficiency and reliability in their outdoor and industrial applications. Crafted with precision, this pulley bush ensures smooth operation and optimal performance, making it an essential addition to your rigging or lifting setup. Whether you&';re a professional or an enthusiast, you*ll appreciate its sturdy construction and versatility. This pulley bush is perfect for a variety of tasks, from climbing and rescue operations to lifting equipment. Its lightweight design allows for easy handling while maintaining strength under load. Trust CMI to provide high-quality equipment that meets the demands of your work or recreational activities, ensuring safety and effectiveness in every use. Features: * Durable construction: Built to withstand the rigors of outdoor and industrial use. * Lightweight design: Easy to handle without sacrificing strength. * Versatile application: Ideal for climbing, rescue operations, and lifting tasks.