When choosing a 3-pole Israel plug insert, there are a few factors to consider:

1. Voltage: Make sure the plug insert is rated for the voltage of the country you'll be using it in. In Israel, the standard voltage is 230 volts.

2. Amperage: The amperage rating of the plug insert should be appropriate for the device or appliance you'll be using it with. Make sure to check the amperage requirements of your device before choosing a plug insert.
   

3. Type of plug: Israel uses the Type H plug, which has three round pins in a triangular shape. Make sure the plug insert you choose is compatible with this type of plug.

4. Quality: Look for a high-quality plug insert that is made from durable materials and has good insulation. This will ensure that it is safe to use and will last a long time.

5. Certification: Check that the plug insert has been certified by a reputable organization, such as the Israeli Standards Institute (ISI), to ensure that it meets safety standards.

Overall, it's important to choose a plug insert that is safe, reliable, and appropriate for the device or appliance you'll be using it with. If you're not sure which plug insert to choose, consult with a qualified electrician or retailer for advice.