BLACK CROWN Built to be indestructible. This big block of heat-treated aluminum is surprisingly light for how exceptionally strong it is thanks to the internal machining. One of the biggest, most obvious features of this stem is its dual 4-bolt clamps. The 4 recessed faceplate bolts keep your bars on and sturdy while the 4 steerer bolts make sure your whole cockpit stays intact and right where you want it. The Black Crown has a dialed extention of 50mm and available in three colors in both 25.4mm and oversized 31.8mm. Riding Style: DH, DS, FR Material: aluminum 6061-T6 Angle: 0 degrees Bar bore: 25.4mm, 31.8mm Diameter: 1-1/8" Extension: 40mm Weight: 340g Stack height: 57mm Colors: black / silver / orange Surface finish: sand-blasted and anodized Manufacturing process: full CNC-machined Logo: all lasered logo