Biologix Sterile Inoculating Loops, Blister Packaging by Biologix are high-impact polystyrene loops with an ultra-smooth loop for even streaking and a round needle at the opposite end for picking colonies. Choose blue 1 µL or orange 10 µL loops, individually wrapped or in packs of 10, 20 or 25. Radiation sterilized, non-pyrogenic, 1000 loops per case.