The Molecular Probes’ Qdot 625 nano-crystal fluorescent labels are offered in combination with BrightLine fluorescence filters for use in imaging or quantitation. Qdot fluorescence labeling products feature a robust nanocrystal structure combined with a customizable surface for a wide range of biological applications. The labels are bright and inherently photostable, making them useful for applications that require high sensitivity and long-term photostability. The optical filters in this set have high transmission and steep edges coupled with a carefully optimized and narrow emission pass-band to match the 625 nm Qdot nanocrystal, while achieving minimal crosstalk from all neighboring nanocrystals.