Product Features Tube: Tube of the functional part is primarily at a 3mm thickness. The weight stack cage is with D-shape tube size: 95 x 81.1 x 3mm and a racetrack tube size: 50 x 100 x 3mm which ensure ultra-durability and stability. Shrouds: Translucent ABS shroud at a thickness of 3.2mm ensures ultra-durability and shock resistance. Upholstery: High-density poly-foam and double stitches offer comfort and endurability. Cable: Self-lubricate American loos™ cable with nylon-coated 12 complex fiber ensures service life more than 250 thousand times. Bottle Holder: The bottle holder fixed on the cage is within reach. Adjustment: Adjustable back and ankle pads to allow easy operation and comfort. Handles: Ergonomic handlebars in TPV material with aluminium ring limit offers comfort and security during a workout. Dynamic Components: All dynamic components are shielded for safety purpose. Pre Stretch: Lathed pulley with a bearing of less tolerance ensure smooth movements. Safety: Meets EN957 safety regulation The Perform Series Leg Extension isolates the quadriceps through a single joint, knee extension movement. The adjustable back and ankle pad ensure sound biomechanics, increases comfort and encourages full quadriceps contraction without hamstring flexibility limitations.