Key benefits Reliable strength: made from aluminum alloy to provide sturdy support for daily riding. Durable finish: black anodized, colorfast surface that resists wear and maintains a clean look. Easy installation guidance: safety line mark helps you insert the post correctly and safely. Clear sizing: standard 25.4 mm diameter with a long 300 mm length to fit many frames. Specifications Diameter: 25.4 mm Length: 300 mm Material: Aluminum alloy Finish: Anodized black, colorfast Safety feature: Safety line mark on the seatpost; insert at least above the minimum safety line during installation Installation note: Please measure and confirm the exact post diameter required for your bike Installation guidance Locate the safety line mark on the seatpost and insert the post so that the insertion is above the minimum safety line. Verify that the seatpost diameter matches your bike's seat tube requirements before installation. Recommended use scenarios Road or touring bikes: replacement seatpost to restore secure saddle height with a standard 25.4 mm diameter. Mountain or urban bikes: durable aluminum post with a black anodized finish for a clean look and reliable performance. Bike or workshop inventory: standard 25.4 mm seatpost size that fits a wide range of frames, suitable for quick replacements or upgrades. Compatibility reminder Please measure and confirm the exact post diameter required for your bike. This post is 25.4 mm in diameter and 300 mm long.