13" DRUM HEAD WITH A SINGLE PLY OF 12MIL FILM. 20 PERCENT THICKER THAN A STANDARD SINGLE-PLY DRUM HEAD. 20 PERCENT THICKER THAN A STANDARD SINGLE-PLY DRUM HEAD. THICKER FILM OFFERS THE FEEL OF A SINGLE PLY HEAD WITH TWO-PLY DURABILITY. INCREASED DEPTH, DURABILITY, ATTACK AND PROJECTION COMPARED TO A 10MIL HEAD. EXCLUSIVE LEVEL 360 TECHNOLOGY COLLAR DESIGN ENSURES PROPER CONTACT BETWEEN DRUM HEAD AND DRUM SHELL.