# About contact model in PFC

**URL:** <https://forum.itascainternational.com/t/about-contact-model-in-pfc/1514>\
**Category:** Uncategorized\
**Created:** [June 9, 2024, 4:20pm UTC](https://forum.itascainternational.com/t/about-contact-model-in-pfc/1514 "2024-06-09T16:20:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ShivamPandey](https://avatars.discourse-cdn.com/v4/letter/s/f4b2a3/32.png) [@ShivamPandey](https://forum.itascainternational.com/u/ShivamPandey)\
**Post date:** [June 9, 2024, 4:20pm UTC](https://forum.itascainternational.com/t/about-contact-model-in-pfc/1514/1 "2024-06-09T16:20:05Z")

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n PFC can I assign two different contact model to “ball-ball” and “Pebble-Pebble” and If possible how.

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**Author:** ![dblanksma](https://avatars.discourse-cdn.com/v4/letter/d/858c86/32.png) [@dblanksma](https://forum.itascainternational.com/u/dblanksma)\
**Post date:** [June 10, 2024, 4:52pm UTC](https://forum.itascainternational.com/t/about-contact-model-in-pfc/1514/2 "2024-06-10T16:52:07Z")

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Hello @ShivamPandey,  
Yes you can assign different contact models to different contact types. You would need to use the “type” keyword in the cmat such as `type "ball-ball"` or `type "pebble-pebble"`. And example can be found here:  
[https://docs.itascacg.com/itasca900/pfc/docproject/source/manual/examples/tutorials/using\_cmat/using\_cmat.html?node5702](https://docs.itascacg.com/itasca900/pfc/docproject/source/manual/examples/tutorials/using_cmat/using_cmat.html?node5702)