The Aquarian Response 2 is a two-ply head manufactured with Aquarian's multi-ply vacuum tuned process that eliminates air bubbles and wrinkles from between the two 7mil plies. Our most versatile two ply head, the Response 2b series delivers a full sound with great attack and consistent tone from drum to drum. • MFSKU TCRSP2-18 • UPC 659007001659