2 Pcs Rubber Pipette Filler, 3 Valves Lab Pipette Filler Bulb, Three Valve Safety Pipette Filler

Got this to use with my pipettes that came with bulbs. Those bulbs were very hit or miss, often not filling the pipette to its maximum markings. I've used both of these so far, and they fit all my sizes (from like 1 mL to 10 mL) with no issues. They work great.

Easy to use in lab analyses

Comes as a package of two. Product is as advertised and fits the pipettes properly. However, one of the three values on one of the bulbs is very stiff and (perhaps malformed?) and difficult to compress. The other valves work fine. And, the second bulb is perfect for my use, so generally I'm happy to use this product for back sweetening a batch of wine.

these are junk. I tried using them with 1 ml pipette and they would not hold liquid in the pipette. I am a very experienced bench scientist that thought he was getting a deal compared to other vendors. But the bulb itself is flimsy and is nowhere near the quality I have purchased from other vendors over the past 40 years. Even a one-star review is generous.

Product was shipped and delivered very quickly and was made of good quality materials. Thank you !

Way cheaper than VWR and seem to work the same as other of these for pipetting.

Did not work as hoped

Good luck using it the way it's set up in the photo with pipette inserted in the opening above the bulb's "A" button. The pipette goes in the other end of the bulb. This is the larger of the two openings and it is designed to take the pipette mouth. Of the two bulbs I received only one worked properly. The other bulb had a defective valve and as a result the liquid could not be dispensed. I've use this type of bulb for years and this manufacturer's product is of very low quality.