SCHOTTEL OEM O-ring, 210.00 mm inside diameter × 4.00 mm cord (cross-section). Static face or radial seal in the SRP / STP gear-housing assembly. SCHOTTEL standard NBR 70 Shore A unless the build sheet specifies FKM/EPDM for a specific service. Note: this part number identifies the SCHOTTEL part family. The exact dimensional or material specification on the as-supplied part may require confirmation against the vessel serial number and equipment data plate — confirm with the vessel's SCHOTTEL service file before final order.