THIS IS A BRAND NEW BICYCLE SEAT POST BY MONGOOSE. IT IS EASY ADJUSTMENT, STEEL CONSTRUCTION. IT CAN BE ADJUSTS TO A VARIETY OF DEGREES OF SUSPENSION. THE SEAT POST IS 25.4mm. CONVERT TO 27.2mm SHIM INCLUDED. TOTAL LENGTH 12" LONG AND 9" FROM SUSPENSION TO INSERTION SECTION. THIS IS A QUALITY MADE BICYCLE SEAT POST.