Ruland Collar, One Piece, Clamp Screw, Bore 42mm, OD 73mm, W 19mm, 1215 Lead-Free Carbon Steel - FHD-MCL-42-F
This Ruland one-piece collar is made of lead-free carbon steel with a 42mm bore and clamp screw fastening.
Manufacturer part number: FHD-MCL-42-F