Product name: Bike Seat Post Adapter Converter Product size:length 5.9cm/5.32inch Product color: As shown in the figure Product material: product features: 1. High-quality material: Made from Quality materials, our bicycle seat post adapter is durable and long-lasting.Applicable to 22.2/ 25.4 27.2/28.6/30/30.4/30.9/31.6/31.8/33.9/34.9/36 2.Easy to install: Our seat post adapter is easy to install and can be fitted to most types of bicycles, including mountain bikes, road bikes, and folding bikes. 3.Versatile: Our seat post adapter can be used to convert your bike's seat post diameter, making it compatible with a wide range of seat sizes and styles. 4.Comfortable: With our seat post adapter, you can ensure a comfortable ride every time. The adapter helps to reduce shock and vibration, making your ride smoother and more enjoyable. 5.Safe and secure: Our seat post adapter is designed with your safety in mind, with a secure and stable fit that will keep your seat in place even during the most demanding rides. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc Bike Seat Post Adapter Converter