Features: 100% brand new and high quality The material is brass, which has better conductivity and longer service life. Uses: Suitable for various environments such as electricians, household appliances, power distribution cabinets, and power distribution boxes. A variety of convenient terminal connectors provide everything you need for quick solderless electrical maintenance in your home, garage, workshop or outdoors. There are many different sizes for different purposes. It has the characteristics flame retardant, high protection level, and good performance. Package Includes: The 150 Pcs Package Includes: 50pcs M3 Inner Diameter: 3.5mm/0.14inch 20pcs M4 Inner Diameter: 4mm/0.16inch 20pcs M5 Inner Diameter: 5mm/0.2inch 20pcs M6 Inner Diameter: 5.5mm/ 0.22inch 20pcs M8 Inner Diameter: 8mm/0.31inch 20pcs M10 Inner Diameter: 9mm/0.35inch The 300 Pcs Package Includes: 100pcs M5 Inner Diameter: 5mm/0.2inch 100pcs M6 Inner Diameter: 5.5mm/0.22inch 50pcs M8 Inner Diameter: 8mm/0.31inch 50pcs M10 Inner Diameter: 9mm/0.35inch The 450 Pcs Package Includes: 150pcs M3 Inner Diameter: 3.5mm/ 0.14inch 60pcs M4 Inner Diameter: 4mm/ 0.16inch 60pcs M5 Inner Diameter: 5mm/ 0.2inch 60pcs M6 Inner Diameter: 5.5mm/ 0.22inch 60pcs M8 Inner Diameter: 8mm/ 0.31inch 60pcs M10 Inner Diameter: 9mm/0.35inch Specifications: Material: Brass Color: Golden Quantity: 150pcs/300pcs/450pcs Size: As Shown in the Picture note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.