SEOH Pipette Filler Rubber Bulb 60 Ml 3-Valve Red

I bought 3 of these; 2 out of the 3 developed cracks in the rubber tube you pinch to control flow. These cracks allowed for air to leak, causing a loss of vacuum. Tried repairing, broke on the other side. Looks like the rubber was old and stiff. The 3rd one is definitely newer and has been fine for a long time.

I have been using this for over a year. It is beginning to wear out despite minimal use.

Just like the one I used for 20 years. This is the type pipette bulb I learned on in college. Takes very little practice to become an exact delivery aid.

I bought this because all of the piper bulbs in my lab leaked air making it difficult to hold a specific volume of liquid in a pipet with the bulb still attached. This one was even worse, it looked to be crudely made and leaked air even worse than the most worn out bulbs in the lab. Complete waste of money.

This product is crudely manufactured and the ball-bearing pressure points leak so they don't completely close when you release finger pressure. Whatever happened to the excellent quality pipette bulbs that Fisher Scientific distributed?

Air leaks, meaning your fluid will slowly trickle out of your pipette.

Thank you.

Product dry rotted after six months of use. Poor seal which resulted in poor suction. Spend the money on a quality piece and NOT this.