ConFirm™ Value Mail-in Biological Monitoring Service - 52 Tests ConFirm™ Value Mail-in Biological Monitoring Service - 52 Tests Sign in to save to your list CVT520 52 tests (Each envelope contains 1 spore test strip and 1 control strip) Postage not included SKU Qty Included CVT520 52 tests per box CVT120 12 tests per box Where to Buy Ask a specialist