Pipettor holders are made from clear acrylic or high density polyethylene. This pipettor holder accommodates most major brands of pipettors making it a useful addition to any laboratory. The pipettor holder comes in three standard sizes for 6 pipettors. The upper rack has 26.1mm (1.02") slots. The lower rack has 16mm (.625") slots. All pipettor holders are supplied with non-skid feet.