CTA part numbers are 1708 - 8mm, 1709 - 9mm, 1710 - 10mm, 1711 - 11mm, 1712 - 12mm, 1713 - 13mm, 1714 - 14mm, 1715 - 15mm, 1716 - 16mm, 1717 - 17mm & 1718 - 18mm. Example applicatons are Diesel glow plugs, Benz C-Class (W204) rear bumper covers, Twin-turbo BMW valve cover bolts (N54), Ford 7.3L glow plugs & BMW N54 valve cover gaskets-10mm deep.