This is a black anodized seat post clamp. This clamp will fit old school 1 inch (25.4mm) frames. It will work with most BMX frames from the 70's, 80's and early 90's that use a 7/8" (22.2mm) seat post and most newer Mini and Junior sized bikes. This clamp is very similar to the old Tuf Neck clamps from the 80's.
