Features:1. It is a rivet set, can meet different using needs.2. Made of high quality aluminium material, which has good corrosion-resistant and long service life.3. The fastening effect is perfect and it is not easy to fall off.4. Rivets are designed with flat head, which makes installation easier.5. Rivet is solid structure with higher mechanical strength.Specification:Condition: 100% NewItem Type: Solid RivetMaterial: AluminumDiameter * Length (mm) (No Caps Included): M4*20, M4*25 (optional)Quantity: 100pcsPackage List:100 * Solid RivetNote:1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.