BULLSPANN Seatpost Bicycle Saddle Post Aluminum Alloy Mountain Bike Road Bike Black 300x31.6mm

[Dimensions] 300x31.6mm (Length x Diameter) Tube thickness: 2.4 mm [Material] Highly durable aluminum alloy [Highly versatile] Suitable for most mountain bikes, road bikes, MTB, etc. 【Installation】Attach directly to the bicycle without any drilling or cutting required. There is a safety line mark on the seat post. Insert it above the safety line. [Note] The size is measured by hand, so there may be an error of 1-2mm. Please measure the actual outside diameter to choose the diameter you actually need before purchasing, or measure the inside diameter of your frame tube. Features: Easy to install. Made of aluminum alloy, it is a durable material that can be used for a long time. Suitable for most mountain bikes, road bikes, MTB, etc. There is a safety line mark on the seat post. Insert it above the minimum safety line. Specifications: Material: Aluminum Alloy Thickness: 2.4mm / 0.09" Dimensions: 300x31.6mm / 11.81"x1.24" (Length*Depth) Hole Size: 31.6x26.8mm / 1.24"x1.06" (OD* ID)Installation steps: 1. Unbolt the old seat and remove the seat. Fix the seat to the new seat. 3. Install it on the bike rack. Note: Due to manual measurement, there may be an error of 1-2mm. Please measure the actual outer diameter. Please choose the diameter you actually need or measure the inner diameter of your frame tube before purchasing.Package Includes: 1 x Bicycle Seatpost.