18PCS = 18 PCS Acrylic Taper Stretching Kit OR 18 PCS Plugs Doble O-Ring Set (14G - 00G). 12PCS = 12 PCS Acrylic Taper Stretching Kit OR 12 PCS Plugs Doble O-Ring Set(10MM - 20MM). 10MM-20MM = 00G (10mm), 1/2" (12mm), 9/16" (14mm), 5/8" (16mm), 18mm, 20mm - 2 qty of each size.
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