This Bio-Tek ELx405 Microplate Washer with Bio-Tek Valve Module is in real good condition and guaranteed to function 100%. It came from a local lab that was upgrading equipment and we can accept pay pal or your credit card. Please contact me with any questions. Missing tray holder The ELx405 is precise, fast and easy to use -- with its own innovative features (keypad display). Providing independent control of both dispense and aspirate manifolds for precise overfill washing and overflow protection in both 96- and 384-well microplates (flat and round) (96/384 model). This unique design washes both 96- and 384-well plates without the need for any hardware changes. With its slanted dispense tubes, full control of dispense and aspiration rates and unique x, y, z positioning, the ELx405 is ideal for cell-based applications too. For those applications that use only 96-well microplates, the ELx405 Auto Plate Washer is an ideal choice for performance and value! Many unique features lower background absorbance values and increase the signal-to-noise ratio of typical ELISA assays. Bio-Tek Valve Module connects 4 reagent bottles to ELx405 microplate washer. Track Page Views With Auctiva's FREE Counter