Filler features a white plastic attachment with a silicone conical adapter that safely attaches to small and large pipets. Attachment does not require twisting the bulb to attach a pipet, minimizing the possibility of pipet breakage. Squeeze the bulb and gently press the pipet to form a seal. Draw liquid by suction; lift away bulb to control fluid dispensing with index finger. Comes with a handy elastic band for hanging on reagent bottle or a wrist. Autoclavable.