The Life/form® GERi™/KERi™ Blood Pressure Arm, Left - Light Skin Tone (LF04079U) or Medium Skin Tone (LF04127U). This BP Arm reproduces all five Korotkoff sounds and allows the instructor to vary the systolic and diastolic levels, the pulse rate, the volume, and the auscultatory gap. For use with all GERi™ and KERi™ manikins.