BULLSPANN Seatpost Bicycle Tube Adapter to Size Conversion Saddle Post Aluminum Alloy Black 1 Piece 30.9mm 31.6mm

[Dimensions] Inner diameter: 30.9 mm, outer diameter: 31.6 mm, length: 60 mm (for conversion from 30.9 mm to 31.6 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. [Note] The size is measured by hand, so there may be an error of 1-2mm. Please measure the outer diameter of your bicycle seat tube before purchasing. Features: The bicycle seat post adapter is made of aluminum alloy material, durable. Stylish appearance, portable, rust-resistant, transform your vehicle's plain interior and add a unique pop of color. Easy to install and remove, no drilling or cutting required, just attach directly to your bike. Specifications: Condition: New Material: Aluminum Alloy Color: Black Inner Diameter: 30.9mm/1.21" Outer Diameter: 31.6mm/1.24" Length: 60mm/2.36" Note: Due to manual measurement, there may be an error of 1-3mm. Package Includes: 1 x Bicycle Seatpost Adapter