brand new and high quality Features: High-strength aluminum alloy tube, high hardness, fine workmanship. The for seat adopts a double-nail rear-drift design to ensure safety in riding. Fine adjustment screws at the bottom of the seatpost can be adjusted according to personal needs. Suit for Road bicycle, mountain bike, BMX etc. Bicycle Seatpost or (Bicycle Seatpost and Bike Seatpost Adapter) Set only,other accessories demo in the picture is not included! Specification: Material: Aluminum Alloy Size: As the pictures shown Optional Color: Black, Red Optional Set Style: A, B, C, D, E, F, G Optional Caliber: 27.2/31.6mm Quantity: 1 Pc or 1 Set Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Suspension MTB Bicycle Seatpost Or 1 x Suspension MTB Bicycle Seatpost 1 x Bike Seatpost Adapter(28.6/30.0/30.4/30.8/33.9 optional)