Transfer Pipets Aperature Aperature 62 ul Large Bulb Thermo Scientific Samco This general-purpose large aperture Samco Scientific disposable transfer pipets are made of shatterproof, nontoxic polyethylene. Non-sterile and bulk packed, the single-unit design features a built-in pipet bulb that eliminates the need for plugging, packaging, autoclaving and helps prevent cross-contamination. Their low-affinity surface reduces loss of cells and valuable proteins due to binding. They can also be frozen in liquid nitrogen or heat sealed for storage. 14 cases