Filler features a white ABS attachment containing a silicone conical adapter that gently seals around pipets without twisting. Pipet does not contact hard plastic, which reduces the risk of cracking and chipping. Just squeeze the bulb, press pipet lightly into soft adapter, then relax the bulb to draw liquid. Comes with handy elastic band for hanging on reagent bottle or wrist. Filler fits standard size pipets.