Clamps come from factory with Nitrile seals.
3” to 6” Clamps: Small bridge pin with 3/8” wide Nitrile seal from factory.
7” to 11” Clamps: Large bridge pin with 1/2” wide Nitrile seal from factory.
12” to 24” Clamps: Large bridge pin with 5/8” wide Nitrile seal from factory.