Two bolt design makes it can be fixed onto bike seat stably and firmly, and they are enduring for long time use,Let you ride bike more safely. Lightweight and won't add much burden for your bike. Widely applied to road and mountain bikes,very popular. Bike Seatpost Made of high quality aluminum alloy material, this product is rather strong and durable. Bike Seatpost Fine workmanship, exquisite and delicate in appearance, comfortable touching feelings, hard-wearing and shockproof. Bike Seatpost Solid and high strength, not easy to deform or break off. This bike seatpost is made of high quality material. It has fine workmanship and two bolt design, characterized by high strength, hard-wearing and shockproof. A great choice for you. Specification: Item Type: Bike Seatpost Material: Aluminum Alloy Color: Black Size: Tube Dia: 27.2mm, 400mm long Applicable models: Universal models Package includes: 1pc*Bike Seatpost