The LinearFlow™ Deep Red Flow Cytometry Intensity Calibration Kit provides flow cytometer operators with intensity references for generating calibration curves, establishing photomultiplier settings and evaluating sample brightness. This kit contains 6 µm fluorescent microspheres stained at 100%, 20%, 4.0%, 0.8%, 0.2% and 0.04% relative intensity levels when excited in a flow cytometer. The microspheres are supplied as suspensions packged in dropper vials for convenient dispensation.