Plastic pestles and tubes are designed to homogenize cells and plant tissue or to resuspend protein and DNA pellets. They are DNAase/RNAase and pyrogen free, and come individually wrapped to guarantee purity. The pestle features a grooved grip, making it easy to turn without slipping, even while wearing gloves. Pestle length is 3” (7.5 cm). Both pestle and tube are autoclavable. Compatible with model 44468-25 pestle mixer, order separately.