The SideStix Boundless Pro Forearm Crutches are designed for use by individuals with lower extremity, mobility and walking disabilities. These height-adjustable crutches are made of 6061 aluminum alloy upper tubing, .875 inches in diameter, and carbon fiber lower tubes, and each crutch has a damper shock absorber. They come with Spenco neoprene grip covers and leather cuff pads. The cuff pads have 6 millimeters of PPT padding. Each crutch also includes a rubber tip adapter and an articulating Tornado rubber tip. A SideStix tool and an allen wrench are included. OPTIONS: Available with side or front opening cuffs or half cuffs. SIZES: Large (adjusts for individuals between 5 feet 6 inches and 6 feet 2 inches in height) and small (adjusts for individuals between 4 feet 6 inches and 5 feet 7 inches in height). DIMENSIONS (L): 32 to 37 inches (large) or 26 to 32 inches (small). CAPACITY: 300 pounds. COLOR: Black. WEIGHT: Each crutch weighs 1.67 pounds (large) or 1.58 pounds (small). WARRANTY: Limited lifetime warranty.