Thomson Seatpost Clamp Great looks, great clamping, long life and no squeaking. The perfect addition to your Thomson Cockpit. The Thomson Seatpost Collar has several features that make it distinct. The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination that has proven to be strong over the years. This fastener combination allows float on both sides of the collar slot ensuring consistent clamping force. The bolt hole angle, height of the collar and offset slot all help create a collar that generates maximum clamping force at only 25 inch pounds of fastener torque. We recommend them for use with dropper seatposts for this very reason, as minimal clamp torque will prolong the service life of a dropper seatpost. Approximate weight 26 grams Made in the USA 12mm tall | Thomson | Seatpost Clamp | Silver | 28. 6Mm