Remo 12 Inch Doumbek 5 mil FIBERSKYN FT Film Head FT 0512 00. Replacement head for 12 inch diameter metal doumbeks. Fits M12T, MB12, M12J and most 12 inch exterior tunable drums. Head is 0.005 Inches thick. This is a Remo Fiberskyn® product, meant to give a warm natural sound with the ease of synthetic.