buffer (bÅ­f'Ér) Chemistry A substance that prevents change in the acidity of a solution when an acid or base is added to the solution or when the solution is diluted.
These Ford Racing Performance Head Gaskets are specifically designed for use with cast iron or aluminum cylinder heads on a Ford 289, 302, 5.0L, or 351 Windsor V8 engine.
In addition to the fireplace or insert, your pro will need to supply the materials required to connect the fireplace to the gas supply, as well as to vent it to the outdoors as required by the manufacturer and local codes, and to build a custom surround if needed.