Multichannel pipettes generally come with either 8 or 12 pipette heads, easily allowing for a single device to fill multiple wells at a single time. This enables the user to quickly and easily fill multi-well plates used in tissue culture, drug screening, or enzyme assays. These pipettes can be calibrated to draw up and dispense amounts ranging from a few microliters to several hundred microliters. Tips are easily loaded and removed for fast disposal.