Description: Versatile Replacement Part: This mushroom head coupler replacement is designed to seamlessly fit and enhance your existing setup, ensuring optimal performance and longevity Premium Materials: Crafted from quality stainless steel and nylon, this product offers exceptional durability and resistance to wear, making it a reliable choice for long-term use Compact Size: With a round diameter of approximately 2 cm, this replacement part is compact yet effective, allowing for easy installation without compromising on functionality Complete Set Included: The package includes 1 complete set of the Gear Coupling Guide, providing everything you need for a quick and hassle-free upgrade Easy Installation: Designed for user-friendly installation, this accessory allows you to effortlessly replace worn-out parts and maintain the efficiency of your equipment with minimal effort Specification: Material:Stainless steel , nylon Size Chart: Dimeter: 2cm/0.79inch Package Includes: 1x 5 TeethGear Coupling Guide Set or 1x 7 TeethGear Coupling Guide Set (optional) or 1x 12 TeethGear Coupling Guide Set(optional) Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.