Item Type: Threaded Insert Material: 303 Stainless Steel Color: Silver Application: Used for Thread Repair and Protection Package List 5 x M4 x 0.7-M8 x 1.25-L6mm Threaded Insert 5 x M4 x 0.7-M.8 x 1.25-L8mm Threaded Insert 5 x M4 x 0.7-M8 x 1.25-L10mm Threaded Insert 5 x M4 x 0.7-M8 x 1.25-L12mm Threaded Insert 5 x M4 x 0.7-M10 x 1.5-L8mm Threaded Insert 5 x M4 x 0.7-M6 x 1-L6mm Threaded Insert 5 x M4 x 0.7-M6 x 1-L8mm Threaded Insert 5 x M4 x 0.7-M6 x 1-L10mm Threaded Insert 5 x M4 x 0.7-M6 x 1-L12mm Threaded Insert 5 x M4 x 0.7-M6 x 1-L15mm Threaded Insert 1 x Storage Box 1Stainless Steel Material: Made of stainless steel, these threaded inserts are wear resistance, corrosion resistance, comes with a long life span. 2Main Application: These threaded inserts are mainly used for parts that require frequent disassembly, it can greatly improve the service life and wear resistance of the thread. 350Pcs: There are 50 pieces threaded inserts in the package with multiple thread specifications, suitable for different thread repair situations. 4Fine Workmanship: These threaded inserts are well made, with clear threads and no jamming, making them easy to install and save time and effort. 5With Storage Case: There is a plastic box for you to carry and classify the inserts, easy for you to carry in and out to help with your work.