All tips are autoclavable and available in bulk packs, nonsterile rack packs, and sterile rack packs. Each rack is stackable, shrink-wrapped with a tear-off seal, and labeled with pipette type and lot number.aspiration. Autoclavable tips are available either non-sterile or gamma-irradiation sterilized, and packaged in racks of 96 or 100. Each rack is stackable, shrink wrapped with a tear-off seal, and labeled with pipette type and lot number.