These are a pair of new Weber 40 DCNF base gaskets, part number 99900.704. They have a 3mm thickness & 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.