The Aquarian Hi Frequency family of heads is recommended for use as batter heads for sensitive playing ( clear model only) or as resonant bottom reso-head. The thin 7mil Nu-Brite film accentuates the higher frequencies in the drum and produces a brighter response. The Hi-Frequency Video Gloss Black or White models are the ideal bottom head for tom-toms when a striking visual look is required. Made primarily as a resonant head, the 7mil HF with Black and White 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! (Black and White Video Gloss models are not recommended for batter head use.)