This is a genuine OEM Kobelco part, number YT30V00087S018, identified as a plug. It is designed for use in a wide range of Kobelco excavator models, ensuring proper fit and function. Confirmed applications include SK130SR, SK130SRLC, SK135SR, SK135SRLC, SK140SRLC, SK170LC, SK210LC, SK210D, SK210DLC, SK210NLC, SK235SR, SK235SRLC, SK260LC, SK260SRLC, SK260NLC, SK300LC, SK350LC, SK400DLC, SK485LC, SK485DLC, SK500LC, SK520LC, SK70SR, SK75SR, SK80CS, SK80MSR, SK850LC, SK850DLC, SK850LC-10, SK850DLC-10, SK850LC-10E, SK850DLC-10E.