CLS3565. aseptic transfer cap for 500 mL plastic spinner flasks, 1/8" dip tube, 0.2 μm vent, male luer lock, sterile, 2/cs. pricing. SDS. CLS3562. aseptic transfer cap for 1 L plastic spinner flasks, 1/8" dip tube, 0.2 μm vent, male luer lock, sterile, 2/cs. pricing.