This pair of E-Rings by Evans are 10" x 1" clear 7mil film. This is an easy-to-use external overtone control ring that "floats" on the surface of the drumhead for minimal buzz. It rounds out and flattens the drumhead's sound and allows for easier tuning. Also available in 14" x 1", 12" x 1.5", 13" x 1.5", 14" x 1.5", 14" x 2", 15" x 2", and 16" x 2". Also in assorted sized sets; Standard, Fusion, and Rock in my other listings.