Notes: Size 0.040in Material Grade Premium Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Carbon Steel Facing UCR-Plasma-Moly; OCR-Gas Nitride Axial Height UCR-3.0mm; LCR-2.0mm; OCR-2.5mm Ring Type UCR:RFK-13PF; LCR:THM-17; OCR: MCL-42NGAW Engine Set (6.7 V8 6651cc )