Origin8 Pro-Fit Seat Clamp, 31.8 mm, Black Annodized Go to amazon.com Related posts 7 best seatpost clamp 31.8 FeatureAnodized or Powder Coated finishSeat clamp allows for secure clampingForged alloy construction DescriptionSEATPOST CLAMP OR8 P-FIT 31.8 BK-ANO