B 543 2RS MAX - 1-1/2 Max-Type EACH 1-9/16 2 x 9/32 inch Headset Bearing (Cannondale)

Cannondale Headshok/Lefty Bearing

39.68mm ID, 50.8mm OD, 7.14mm thickness
1 9/16” ID, 2” OD, 9/32” Thick