Description: Material: Made of steel and ABS material, with metal threads and spring pins, clear texture, exquisite workmanship, sturdy and durable. Matches well with your fitness equipment. Design: Plum blossom-shaped handle design, beautiful and practical, not easy to fall off. The knob has a built-in spring handle that won't scratch your hands with use. Easy to Install: Installation is convenient and fast. You can easily adjust and fix your fitness equipment and solve your fitness equipment problems. Wide Applications: Adjustment Fitness Pull Pin Knobs are suitable for most home fitness equipment, such as exercise bikes, bicycles, strength equipment, and fitness equipment. Note: Please confirm the size you need before purchasing. We will provide you with fitness pull-pin knobs of different sizes to meet your needs. Specification:Material: Steel and ABSColor: BlackScrew Diameter: M18 x 1.5Screw Length: 20.5 mm / 0.81”Total Size: 65 x 54 mm / 2.56“x 2.13”(L*W)Package Content: 5pcs x Pull Pin Spring Knob Replacement Parts