Remo S-Series Skyndeep Bongo Drumhead 6.75" Black CalfskinThe Remo S Series Skyndeep 6. 75" bongo drumhead with the Black Calfskin graphic is the macho (small drum) head for S Series bongos. Skyndeep embeds the graphic into the film so it won't scratch or peel during use. S Series collar fits S Series hardware. Black Calfskin has a sleek, dark look that complements most shell finishes. A solid synthetic replacement head with a distinctive visual for the macho position.