BRAVE MACHINE 31.6mm MTB BIKE SEAT POST DOUBLE CLAMP 3D FORGED STRONG 350mmTOP BRAND LIGHTWEIGHT MTB, DOWNHILL BIKE, TREKKING UNIVERSAL SEAT POSTVERY HIGH QUALITY MADE FROM EXTRA STRONG 3D FORGED ALUMINIUMDOUBLE SEAT POST CLAMP HEAD MAKING IT MUCH MORE SECURE AND EASILY ADJUSTABLEDIRECT MOUNTLENGTH: 350mmHAS 9 12 (240mm) OF ADJUSTMENTSEAT POST DIAMETER: 31.6mmWILL LOOK GREAT ON MOST BIKE TYPESBRAVE MACHINE LOGOSATIN BLACK FINISH350grams APPROX