The VEL13 is a 13" two ply (2x7mil), Black texture coated head. The Hi-Velocity series uses a reverse "Power-Thin Dot" for added strength. The VEL13 sounds great in virtually all musical situations including Rock, Country, Blues and Pop or anywhere that you that need a bright, open and articulate head. Two plies of 7 mil Nu-brite film Power -Thin Dot mounted under the head Black or White, Texture Coated makes for greater warmth and articulation