This oil filler plug (SILVER ANODIZED) with Allen head looks great because of its finish and has good function as a locking plug.
Use a size 5 Allen key in order to fit and remove (usually found in your OEM BMW tool-kit).
Will Fit all 4 Valve models such as
R850, R1100GS/RT/R/RS, R1150GS/RT/R/RS & R1200C
This listing is for the SILVER ANODIZED version of this cap, we also have Black and Polished. Please see the correct listing for the color you are looking for.
Stock image used, actual product may vary slightly.