Feature: 1. Metal: These thread tension assembly adopt premium metal material, which is strong and reliable. 2. Glossy Surface: These M700 thread tension feature glossy surface without scratches, greatly improving your efficiency. 3. 4 Pieces: 4 pieces of overlock sewing machine thread tension assembly are packed together, meeting your needs. 4. Long Service Life: These sewing machine thread tension can be used for a long time, practical and durable. 5. Time Saving: These thread tension assembly help you create many professional sewing processes and save a lot of time. Specification: Item Type: Thread Tension Assembly Material: MetalProduct Specifications: 4 Pieces Product Application: Household Use Application Scope: Most Scenarios Product Size: Approx. 4cm / 1.57in ( Manual Measurement, Slight Error May Exist ). Package List: 4 x Thread Tension Assembly Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.