Product Description: Color: Black Quantity : 100/50/5pcs Material: Plastic Head Diameter (max.): 15mm Fit Hole Size: 8mm Stem Length: 12mm Total Length: 16mm Rivet post pressure expands legs for fast and permanent fastening. Used widely for car For Fender, bumper, door or other car surface. These rivets are made of the plastic material, fit 8mm diameter hole. Package Included: 40/20/10 Pcs/set Plastic Rivets Note: 1. You need make sure that you have corresponding frequency controller before you buy it 2. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!