ONiLAB 18900071 316L Stainless Steel 4 Bladed Propeller Stirrer ，50 mm Stirrer Diameter, 8 mm Shaft Diameter, 400 mm Shaft Length

I use these in shore 10A - 020 silicone, and they power through without adding too much air.There are tiny gaps in the welding where the mixing blades are attached to the rod, and material can easily get stuck there which is hard to clean out.

Fantastic Customer Service from this company.The overhead mixer is great, but I had a bit of an issue with it so I reached out to the OniLab customer service team by email.I was pretty much blown away at how responsive they were in helping me, as I did not expect this level of service on an Amazon purchase. The rep that I dealt with was kind, courteous and went above and beyond to correct the issue quickly and completely.I'm very happy with this mixer and with the company that sells it. Thank you for helping me resolve my issue so quickly, you went over and above any expectations that I had.

Very versatile overhead mixer. We used this for emulsions and dispersions. Small footprint but powerful and reliable.

The impeller ran out 0.030", and the chuck on the stirrer runs out 0.005", added together, the run out is substantial at the end of a 400 mm shaft. Unusable for laboratory work.

This ended up not working for me, but the product did exactly what it was supposed to and should work for applications smaller than what I was looking for. I needed a blade that was 7-10" wide and I couldn't find one anywhere that fit the circumference of this unit's chuck. It almost worked, but couldn't get all our mixture to flow with the size of the included blade.Highly recommended, I would gladly pay for a larger one if they made it. It's much smarter than the mixer we are using currently.