13" DRUM HEAD MADE USING TWO PLIES OF 7MIL FILM. TWO PLIES OFFER CONSISTENCY AND DURABILITY FOR LONGER PLAYING TIME. TWO PLIES OFFER CONSISTENCY AND DURABILITY FOR LONGER PLAYING TIME. 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.