25.4x450mm Bicycle Bike Seat Post Aluminum Alloy Seat Tube without Scale Mark Black Universal

25.4x450mm Bicycle Bike Seat Post Aluminum Alloy Seat Tube without Scale Mark Black Universal Feature: Easy to install. Made of aluminum alloy, Durable materials for long time service. Suitable for most of mountain bikes, road bike, MTB etc. There is a safe line mark on the seat post. Please insert at least above the minimum safety line. Specification: Material: Aluminum Alloy Color: Black Thickness: 2.5mm / 0.1″ Dimension: 450×25.4mm / 17.72″x1.00″(L*D) Hole 1 Size: 25.4×20.7mm / 1.00″x0.81″(OD*ID) Hole 2 Size: 22.2×17.2mm / 0.87″x0.68″(OD*ID) Note: The size measured by hand, so it may have a little 1-2 mm difference. Note: Please do measure the original outer diameter then choose the actual required diameter or measure the inner diameter of the frame tube before purchasing. Package Included: 1 x Bicycle Seat Post Easy to install. Made of aluminum alloy, Durable materials for long time service. Suitable for most of mountain bikes, road bike, MTB etc. Dimension: 450×25.4mm / 17.72″x1.00″(L*D) Package List: 1 x Bicycle Seat Post