You will get all 4 barbell sizes 6,8,10 and 12mm lengths with 8 different sizes of the surgical steel balls, 3, 4x(2), 5, 6x(2), 8 and 10 mm diameters. All balls fit all barbells so you can make any combination you like to make you feel the maximum pleasure. You can put the biggest one to make you feel pressure or just the smallest one to feel nothing, it is all up to your mood,
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