Consumables Consumable products include : FiltriX® filters, Sarstedt sample tubes and Sheath Fluid. FiltriX® filters 30 µm and 50 µm nylon-mesh filters for separation of nuclei from cellular debris Sarstedt Sample Tubes 12 mm x 55 mm polystyrene sample tubes Sheath Fluid Concentrate Each 100 ml bottle of QuantaCyte Sheath Fluid Concentrate makes five liters of sheath fluid for use in flow cytometers and ploidy analyzers.