The aquarian performance ii 20 bass drum head is a high quality bass drum head from aquarian constructed from two plies of durable 7mil film. The clear head is constructed using aquarians vacuum process which ensures there are no wrinkles or air bubbles between the plies for optimum response and sensitivity. Performance ii heads are designed for loose tuning enhancing the tonal depth and punch creating a classic rock and roll sound. The head can be used on any 20 bass drum offering consistent tuning and tone throughout every performance or session. Available in both clear and coated versions and in a wide range of sizes to fit your kit the aquarian performance ii bass drum heads are perfect for drummers looking to achieve the classic rock and roll sounds of the past.