Notes: Size 0.020in Material Grade Premium Material UCR-Carbon Steel; LCR-Ductile Iron; OCR-Cast Iron Facing UCR-Plasma-Moly; OCR-Chrome Axial Height UCR-2.5mm; LCR-2.0mm; OCR-3.0mm Ring Type UCR:RFK-13PF; LCR:RBT-17; OCR: GCL-40URW Single Cylinder Set (6.4 V8)