13" DRUM HEAD MADE USING A SINGLE PLY OF 10 MIL FILM. A SINGLE PLY OFFERS AN OPEN AND EXPRESSIVE SOUND. A SINGLE PLY OFFERS AN OPEN AND EXPRESSIVE SOUND. VERY VERSATILE HEAD FOR ALL MUSIC GENRE APPLICATIONS, A TRUE WORKING DRUMMER'S CHOICE. ALSO AVAILABLE IN A COATED VERSION. EXCLUSIVE LEVEL 360 TECHNOLOGY COLLAR DESIGN ENSURES PROPER CONTACT BETWEEN DRUM HEAD AND DRUM SHELL.