Rockshox reverb enduro height collarthe reverb enduro height collar from rockshox lets you limit post travel the machined aluminium hinged clamp means it couldnt be easier to fit features machined aluminum collarclamp for rockshox reverb height adjustable seatpost used when wanting to limit travel of post from full potential hinged clamp for easy installationbuy rockshox components from chain reaction cycles the worlds largest online bike store