The best 3 piece trainer set for women. the pubococcygeus (pc muscle) is the hammock-like muscle that stretches from your pubic bone to coccyx, supporting your pelvic organs and internal genitalia. a strong pc muscle is the key to more intense orgasms and greater urinary control, as well as helping during childbirth. read al about this in the enclosed pdf manuel.weightami 1 47g / 1.65ozami 2 78g / 2.75ozami 3 106g / 3.73ozlength inc. cordami 1 111mm / 4.37 inchesami 2 156mm / 6.14 inchesami 3 144mm / 5.66 incheslength excluding cordami 1 36mm / 1.41 inchesami 2 80mm / 3.14 inchesami 3 70mm / 2.75 inchesmaximum diameterami 1 36mm / 1.41 inchesami 2 32mm / 1.25 inchesami 3 28mm / 1.10 inches