.5mm Float Needle Shim for the 32 / 36 NDIX Carburetors found on the Unimog, Pinzgauer, and Porsche. In general a 1mm change in shim = 4MM of float level change. These get "stacked" under the float valve to set the float level.
We would suggest 4 x Pieces per Carb to give room for adjustment.