The Hi Frequency is a thin, 7mil single ply head. Recommended for sensitive playing or as a resonant bottom head. The 7mil Nu-Brite film brings out higher frequencies in the drum and produces a brighter response when used as a lightweight batter or resonant head on toms. The Hi-Frequency in Video Gloss Black or White is the ideal bottom head for tom-toms when a striking visual look is required. Made primarily as a resonant head, the 7mil HF with Video Gloss inverted finishes brings out higher frequency overtones in a drum with a clean and choke free response. This head makes your toms look and sound great! Not recommended for batter head use.