Remo R-Series Low Collar Nuskyn Bongo Drumhead - 7.15 inchesThe Remo R Series Low Collar Nuskyn bongo drumhead in 7. 15" is sized for the macho position on R Series bongos. Nuskyn gives you warm, organic tone modeled after calfskin while remaining stable through humidity and temperature changesno soaking, no re tuning due to weather. Low collar design is specific to R Series bongo hardware. Responds well to all standard bongo technique. A reliable, tonally warm replacement for the macho drum in an R Series set.