1. To buy O-rings in large quantities, first choose the manufacturer and brand. The imported ones are nothing more than the well-known brands. For domestic ones, look at the time when the manufacturer was established, the scale, whether the equipment is complete, and whether the technicians are knowledgeable.

Because we purchase in batches, it will be troublesome if the quality is not good, so before we sign the contract, we'd better try the samples of the other manufacturer to see if they are suitable for our own equipment and use.

3. The price of O-rings is also a factor we consider. We can compare goods among three manufacturers and choose manufacturers with higher cost performance. Of course, many small manufacturers are very cheap. At this time, we should be vigilant against shoddy things.

4. After we have determined the O-ring of a certain company, we can go to the other party's factory to check whether the other party's production strength and production environment have certain ability as they say.

5 when signing the contract, carefully check the relevant detailed rules and relevant maintenance measures. Don't rush to confirm when delivering. You can randomly select several O-ring products to see if there are quality problems.

As long as we compare with more stores, check more and test more when purchasing O-rings, the probability of buying low-quality O-rings will be greatly reduced