Big Dipper, MLEK-RET-22.5, Upgrade Kit for 22.5” Big Dipper 8000,21000,14000, and 40000. Only for units sized 75 GPM (W-750-IS) or smaller, provide odor protecting technology, includes new 51000 complete lid assembly, includes new high performing foam gasket, includes new grease collector, includes two (2) new stainless steel lids, includes (3) year warranty on new complete lid assembly