Product Information: EVANS MS1 White Marching bass drumheads offer a traditional single-ply, 10mil film without muffling, providing the widest range of damping options. The MS1 series is very durable and projects warm, musical tones both indoors and out. Product Features: 26" drum head with a single ply of 10mil film Bright and resonant tone Traditional sound and feel May be used with any variety of internal or external muffling techniques All Evans drum heads are designed, engineered and manufactured in the USA For more information and specifications, please refer to the manufacturers website