NATURAL Bison Skin Head, Handcrafted Quality. Thickness medium to thick. Superior material for making the drum head. And, it is long lasting, consistent sound, transparent sound, long lasting sound. Best Use for: Shamanic Drum, Djembes, Drums, African Drums, Bodhrans and Tambourines. Natural Un-tanned leather, finished form ready to use for replacing head of your instruments. Please select your perfect size from diameter Variations according to your drum. 100% Natural Material. Color, Hue, Pattern, Thickness, Shape, Texture, and Consistency will vary. If you have any questions about your purchase, please feel free to ask.