This is a new Weber 42 DCNF carburettor 5mm base block with fitted gasket either side. It is a dedicated fit for this carburettor only. It should be fitted dry with no sealants. DCOE, DCO/SP, DGAS, DGMS, DGV, DGAV, DMTL, DMTR, IDF, IDA, DCD, ICH, DCNF, DRT, DFM, DFV, TLDM, DFT, DIR, DFEV, TL, DRTC, DFTH, IDAP, ICEV & many more.