This handy accessory fills in two useful functions. On the one hand it prevents your seatpost to drop into your frame. On the other hand it helps you to define your saddle height quickly without laborious measuring. Does your seatpost always lowers into your frame? The aluminum stopper is the solution. This version is suitable for seatposts with a diameter of 27.2mm. Its minimalistic and sleekly designed matches any bike. Maximum Torque of 3Nm advised.