Features: made of high-quality material, machined from solid billet aluminum, which is durable- and anti-corrosion. This Quick-Release Hardware Kit allows the riders to remove seats easily and quickly. This Seat Mount Bolt has a gloss black finish and a stylish shape to enhances excellent appearance. Knurled knob easy to install or remove without tools. Package includes 1 x Seat Bolt Screw or 1 x Knob Tab Cover. Specifications: Material: aluminum alloy Screw length: approx 3.2cm/1.3-inch Base size: 3x5cm/1.2x2-inch Note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Seat Bolt Screw Or 1x Knob Tab Cover