Fits 32/36 DGV, DGAV, DGEV carburetors. Weber main jet sizing nomenclature refers to the flow rate in hundredths of a millimeter (0.01mm). A 150 main jet, for example, flows the same as a perfect hole with a 1.50mm diameter. Larger numbers make the engine run richer from off-idle to about midrange RPM. Jets are sold individually. Also fits Weber ADF, DARA, DCD, DCN, DCZ, DFAV, DFEV, DFI, DFM, DFV, DHSA, DIC, DICA, DIR, DMSA, ICH, ICT, and IDA (3-barrel) carburetors.