The fireplace set consist of a steel grate, custom designed, to hold the 1960s limestone balls. The limestone balls were used in water filtration systems much like the earlier marble balls were. The limestone balls have been cleaned and sanitized.
The fireplace set can be used as decor when the fireplace is not in use or it can be used in a gas fireplace to replace gas logs. The sets come in 6 different sizes and yours will depend on the size of your fireplace.