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.