Portable Pipet-Aid XL and AccessoriesPortable Pipet Aid XL and Accessories Longer lightweight handle reduces arm strain Efficient pump for extended operation Three speed settings for precise control The Portable Pipet Aid XL has a longer handle to reduce arm strain during pipetting. Its ergonomic design includes an adjustable sliding hand rest and a removable stand that allows you to set down the pipet without fear of contamination. The unit features a quieter more powerful pump, an EZ