This Cionlli Bicycle Bike Seat and Bell Gel Fusion Cover in Black is the perfect addition to your bike setup. The seat features a comfortable design, with a gel material that provides a pleasant riding experience. The black color and sleek design make it a stylish choice for any bike. Included with the seat is a bottom bracket and bell, making it a great value and easy to install. This seat is compatible with a variety of bike types, including adult tricycles and BMX bikes. The rail/clamp style is 7 x 7 mm, and the item dimensions are 30 mm x 30 mm x 2.1 in. This high-quality seat is a must-have for any cycling enthusiast.