The ST-Series Suede Hazy low-profile steel insert timpani drum heads feature Surface Tension Technology for easy clearance and tunability. These characteristics also provide focused tone, dynamic sensitivity and enhanced articulation. Featuring a unique, specially treated Hazy 7.5-mil film combined with a Low-Profile Steel Insert ring for added tuning stability and projection, ST-Series Suede Low-Profile Steel Insert Timpani drum heads provide the look and feel of calfskin with outstanding strength and consistency. Many sizes available.