Stuffing, filling, or dressing is an edible mixture, often composed of herbs and a starch such as bread, used to fill a cavity in the preparation of another food item.Many foods may be stuffed, including poultry, seafood, and vegetables.As a cooking technique stuffing helps retain moisture, while the mixture itself serves to augment and absorb flavors during its preparation. Stuffing box components are of stainless steel, brass or other application-specific materials. Compression packing is rigorously tested to ensure effective sealing in valves, pumps, agitators, and other rotary equipment. Gland. A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. ...