LabZhang 2 pcs Lab Pipette Filler Bulb 3 Valves Natural Rubber Pipets

It does the job and I like it. However, sometimes it is a little bit too hard to collect liquid when pressing it. Nevertheless, it's precision is good.

These bulbs have a couple of different ends for your pipettes. There are some items like this that are power or battery operated, but these are simple rubber squeeze balls, old school. Dependable. These are made of natural rubber and I expect them to last many years.

It’s cheap and works. The only issue is you need to squeeze kinda hard to make the release valve work.

I have bought many units of these tips. They had done the job. Although they are a little hard they worked. However the last 12 I bought were all bad, no suction. In the video you can see how the liquid does not rise.

Great seal, the 3 valve system allows for great control over pipette flow.

It measures accurately, but it's very difficult to use because you have to squeeze it so hard to get it to draw anything up. I don't have good grip strength which makes pipetting with this bulb arduous.

I have to keep buying more because the glass bead break or falls out