This is my existing oarpin with the plastic oarcage attached. The pin was made by Bob Lavertue at Springfield Fan Centerboard Co. Silicone bronze, it has to be half inch diameter on the end that goes into the oarstrap, 13mm where it engages the Concept2 oarcage. The new ones will be one inch taller to see if I can get a bit more comfortable posture, catch fewer clams. We'll see.