Extragene Universal Pipette Tips 200 ul, Non Sterile DNase/RNase free Autoclavable, Racked 96 tips/rack, Pk x 10 racks (960 Tips) Graduated Universal Racked Pipet Tips. Allow uses with virtually all popular pipettors.Special design for reduced retention and accurate sample discharge. Packaged in racks and pre-sterilized. Best price and great quality.High temperature may cause warping or decreased structural integrity. Stability for the tips while saving valuable lab bench space.