Features: – Specially Formulated. Midwest Hearth vermiculite is formulated for use in vented gas log set fireplaces utilizing propane gas. – Added Realism. Distributes heavier propane gas throughout the entire burner pan for a fuller flame effect. – Adds Sparkle and Shine. The mica-like flakes add sparkle and shine to the fireplace for additional effect. Safety: ✔ This high-quality exfoliated vermiculite is 100 percent asbestos free and does not contribute to carbon monoxide or oxygen depletion. ✔ Midwest Hearth vermiculite is lightweight, incombustible, compressible, highly absorbent, and non-reactive. Compatibility: – Vented or Unvented fireplaces – Natural Gas (NG) or Propane (LP) fireplaces Installation: – Always refer to your appliance’s owner’s manual for accurate placement instructions. – Fill the burner pan completely with the vermiculite. Avoid spilling on the pilot assembly. – Do not place vermiculite on other parts of the burner or heat shield. – Slope the vermiculite at the same angle as the burner pan to aid in even flame distribution. Included: – Packaged in a generous 9″x12″ bag – 12 ounces.