Proficiency check samples distributed in the check sample program are available for sale in limited quantities for $50 a bag. These samples bags weigh between 1.5 and 3 ounces. Please select Year, Month, and which Proficiency Check Sample.
Proficiency check samples distributed in the check sample program are available for sale in limited quantities for $50 a bag. These samples bags weigh between 1.5 and 3 ounces. Please select Year, Month, and which Proficiency Check Sample.