* BRAND NEW HIGH QUALITY MADE BY FITO. * SEAT POST DIAMETER: 25.4MM (O.D.). LENGTH: 350MM. * MATERIAL: STEEL. * BUILD-IN SUSPENSION WITH CLAMP. FOR BEACH CRUISER BIKES, MOUNTAIN BIKES, TANDEM BIKES, COMFORT BIKES, AND BMX BIKES. * PLEASE NOTE THAT THE SUSPENSION IS DESIGNED FOR ABSORBING THE SHOCKS FROM THE ROADS SUCH AS HITTING A POTHOLE. IT'S NOT FOR MAKING THE RIDE LIKE SEATING ON A LIMOUSINE. * BECAUSE OF THE DESIGN OF SUSPENSION, THE LOWEST SEAT POSITION WILL BE INCREASED AROUND 3" AFTER THE SEATPOST IS INSTALLED. PLEASE MEASURE THE MAXIMUM SEATPOST INSERTION LENGTH OF YOUR BIKE AND MAKE SURE THE RAISED SEAT POSTION WILL BE SUITABLE FOR YOU BEFORE PURCHASE.