Vitros Immunodiagnostic HBsAg CONFIRMATORY KIT * REF 680 1324. Firm on label: Ortho-Clinical Diagnostics, 62 The Broadway, Amersham, Bucks, UK. UPC *+H221680132412* . Each kit contains: 1 x kit of reagents, and protocol card for HBsAg Confirmatory Kit. According to the firm (but not on label), there are 60 neutralization reactions per confirmatory kit.