CountCheck Beads, ready-to-use, 50 tests

CountCheck Beads for lasers with blue 488 nm emission and ideal controls for monitoring and verifying instrument performance. Absolute counting quality control and reference beads.  Ready-to-use kit with 3 Levels of bead controls ranging from 30,000 to 300,000 counts/mL. Approved concentration with each lot.

Low: 30,000 counts/mL, 2 x 25 mL vials
Medium: 100,000 counts/ml, 2 x 25 mL vials
High: 300,000 counts/ml, 2 x 25 mL vials 

*This item is perishable and will only be shopped via FedEx 2nd day service Monday through Wednesday or by overnight service from Monday through Thursday.