Thermo Scientific QSP 10ul XL length Graduated 2,5,10,20ul pipette tip Thermo Scientific Description: Experimental results may be compromised when using standard pipette tips due to sample retention. We utilize a unique manufacturing process to produce QSP Low Retention tips. These tips have a hydrophobic inner surface which significantly reduces sample loss and maximizes sample recovery. QSP Low Retention tips are the answer to the researcher's need to accurately and precisely recover samples.