The RC-Series Renaissance® Hazy Low-Profile Steel Insert Timpani drum heads are the ultimate in warm, dark, focused tone, with dynamic sensitivity, enhanced articulation, and full-range projection for the most discriminating Timpanists. Featuring a unique, specially treated Hazy 7.5-mil film combined with a Low-Profile Steel Insert ring for added tuning stability and projection, Renaissance® Low-Profile Steel Insert Timpani drum heads provide the look and feel of calfskin with unparalleled strength and consistency. Designed by the world's top Timpanists and tested in the world's top Concert halls, Renaissance® Hazy Low-Profile Steel Insert Timpani drum heads are the industry standard for professional Timpanists and Timpani manufacturers worldwide. With the perfect combination of performance and durability, these are the best-selling synthetic Timpani drum head in the world.